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McMaster University
1.
Wu, Qingsong.
Algorithms for Multiple Ground Target Tracking.
Degree: PhD, 2018, McMaster University
URL: http://hdl.handle.net/11375/22741
► In this thesis, multiple ground target tracking algorithms are studied. From different aspects of the ground target tracking, three different types of tracking algorithms are…
(more)
▼ In this thesis, multiple ground target
tracking algorithms are studied. From different aspects of the ground target
tracking, three different types of
tracking algorithms are proposed according to the specialties of the ground target motion and sensors employed.
Firstly, the dependent target
tracking for ground targets is studied. State dependency is a common assumption in traditional target
tracking algorithms, while this may not be the true in ground target
tracking as the motion of targets are constraint to certain path. To enhance the
tracking algorithm for ground targets, starting with the dependency assumption, Markov Random Field (MRF) based Probabilistic Data Association (PDA) approach is derived to associate motion dependent targets. The driving behavior model is introduced to describe motion relationship among targets. The Posterior Cramer-Rao Lower Bound (PCRLB) is derived for this new motion model. Experiments and simulations show that the proposed algorithm can reduce the false associations and improve the predictions. Eventually, the proposed approach alleviates issues like the track impurity and coalescence problem and achieves better performance comparing to standard trackers assuming state independence.
Ground target
tracking using cameras is then studied. To build an efficient multi- target
visual tracking algorithm, fast single target
visual tracking is an important component. A novel
visual tracking algorithm that has high speed and better or comparable performance to state-of-the-art trackers is proposed. The proposed approach solves the
tracking task by using a mixed-motion proposal based particle filter with Ridge Regression observation likelihood calculation. This approach largely reduces the exhaustive searching in common state-of-art trackers while maintains efficient representation of the target appearance change. Experiments on 100 public benchmark videos, as well as a high frame rate benchmark, are carried out to compare the performance with the state-of-art published algorithms. The results of the experiment show the proposed tracker achieves good performance while beats other algorithms in speed with a large margin.
The proposed
visual target tracker is integrated into a new multiple ground tar- get
tracking algorithm using a single camera. The multi-target tracker addresses the issues in the target detection, data association and track management aside from the single target tracker. A perspective aware detection algorithm utilizing the re- cent advanced Convolutional Neural Networks (CNN) based detector is proposed to detect multiple ground targets and alleviate the weakness of CNN detectors in detecting small objects. A hierarchical class tree based multi-class data association is presented to solve the multi-class association problem with potential misclassified detections. Track management is also improved utilizing the high efficiency detectors and a Support Vector Machine (SVM) based track deletion is proposed to correctly remove the dead tracks. Benchmarking is presented…
Advisors/Committee Members: Kirubarajan, Thia, Electrical and Computer Engineering.
Subjects/Keywords: ground target tracking; visual tracking
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APA (6th Edition):
Wu, Q. (2018). Algorithms for Multiple Ground Target Tracking. (Doctoral Dissertation). McMaster University. Retrieved from http://hdl.handle.net/11375/22741
Chicago Manual of Style (16th Edition):
Wu, Qingsong. “Algorithms for Multiple Ground Target Tracking.” 2018. Doctoral Dissertation, McMaster University. Accessed March 06, 2021.
http://hdl.handle.net/11375/22741.
MLA Handbook (7th Edition):
Wu, Qingsong. “Algorithms for Multiple Ground Target Tracking.” 2018. Web. 06 Mar 2021.
Vancouver:
Wu Q. Algorithms for Multiple Ground Target Tracking. [Internet] [Doctoral dissertation]. McMaster University; 2018. [cited 2021 Mar 06].
Available from: http://hdl.handle.net/11375/22741.
Council of Science Editors:
Wu Q. Algorithms for Multiple Ground Target Tracking. [Doctoral Dissertation]. McMaster University; 2018. Available from: http://hdl.handle.net/11375/22741

University of Manitoba
2.
Mahmoud, Ahmed.
Multi-scale particle filtering for multiple object tracking in video sequences.
Degree: Electrical and Computer Engineering, 2018, University of Manitoba
URL: http://hdl.handle.net/1993/33256
► The tracking of moving objects in video sequences, also known as visual tracking, involves the estimation of positions, and possibly velocities, of these objects. Visual…
(more)
▼ The
tracking of moving objects in video sequences, also known as
visual tracking, involves the estimation of positions, and possibly velocities, of these objects.
Visual tracking is an important research problem because of its many industrial, biomedical, and security applications. Significant progress has been made on this topic over the last few decades. However, the ability to track objects accurately in video sequences having challenging conditions and unexpected events, e.g., background motion, object shadow, objects with different sizes and contrasts, a sudden change in illumination, partial object camouflage, and low signal-to-noise ratio, remains an important research problem. To address such difficulties, we adopted a multi-scale Bayesian approach to develop robust multiple object trackers.
We introduce a novel concept in the field of
visual tracking by adaptively fusing
tracking results obtained from a fixed or variable number of wavelet subbands, corresponding to different scene directions and object scales, of a given video frame. Previous approaches to
visual tracking were based on using the full- resolution video frame or a smoothed version of it. These approaches have limitations that were overcome by our multi-scale approach that is described in detail in this thesis. This thesis describes the design and implementation of four novel multi-scale
visual trackers that are based on particle filtering and the adaptive fusion of subband frames generated using wavelets.
We evaluated the performance of our novel trackers using different video sequences from the CAVIAR and VISOR databases. Compared to a standard full-resolution particle filter-based tracker, and a single wavelet subband (LL)2 based tracker, our multi-scale trackers demonstrate significantly more accurate
tracking performance, in addition to a reduction in average frame processing time.
Advisors/Committee Members: Sherif, Sherif (Electrical and Computer Engineering) (supervisor), Yahampath, Pradeepa (Electrical and Computer Engineering).
Subjects/Keywords: Visual tracking; Video Tracking
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mahmoud, A. (2018). Multi-scale particle filtering for multiple object tracking in video sequences. (Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/33256
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mahmoud, Ahmed. “Multi-scale particle filtering for multiple object tracking in video sequences.” 2018. Thesis, University of Manitoba. Accessed March 06, 2021.
http://hdl.handle.net/1993/33256.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mahmoud, Ahmed. “Multi-scale particle filtering for multiple object tracking in video sequences.” 2018. Web. 06 Mar 2021.
Vancouver:
Mahmoud A. Multi-scale particle filtering for multiple object tracking in video sequences. [Internet] [Thesis]. University of Manitoba; 2018. [cited 2021 Mar 06].
Available from: http://hdl.handle.net/1993/33256.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mahmoud A. Multi-scale particle filtering for multiple object tracking in video sequences. [Thesis]. University of Manitoba; 2018. Available from: http://hdl.handle.net/1993/33256
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Edinburgh
3.
Welensky, Zachary.
The effect of task demands and artificially manipulated object salience on visual attention in real world scenes.
Degree: 2008, University of Edinburgh
URL: http://hdl.handle.net/1842/2901
► Eye movements during real-world scene viewing have been shown to be influenced by two main mechanisms of attention allocation: bottom-up and top-down. The exact effect…
(more)
▼ Eye movements during real-world scene viewing have been shown to be influenced by two main mechanisms of attention allocation: bottom-up and top-down. The exact effect each mechanism has on attention allocation is the focus of much debate, however, the use of eye-trackers has allowed progress towards a more comprehensive understanding. Here we utilise the Itti and Koch (2000) model of saliency-based search to manipulate a critical object within forty-eight real-world images. In doing so, we aim to analyse the effect of
visual saliency on attention allocation during real-world scene viewing and active search. To examine the effect of
visual saliency and task demands on attention allocation we recorded the time taken to first fixate on a critical object within each scene, as well as first fixation durations and average saccade amplitudes. In addition, semantic congruence of the critical object was manipulated in 50% of the real-world images. Results from two experiments indicate that task demands significantly influence time taken to first fixate on the critical object. Contrary to previous research, it was observed that attention allocation during real-world scene viewing is guided predominately by higher level cognitive factors. Conversely, attention allocation during active search was influenced predominately by low-level
visual features. Interactions of saliency and semantic congruence were also observed. Together these results suggest that a single attention allocation mechanism is not sufficient to explain the diversity of eye movement patterns recorded and that additional research is required to fully understand the factors influencing attention allocation during real-world scene viewing and active search.
Advisors/Committee Members: Henderson, John.
Subjects/Keywords: visual attention; eye tracking
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Welensky, Z. (2008). The effect of task demands and artificially manipulated object salience on visual attention in real world scenes. (Thesis). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/2901
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Welensky, Zachary. “The effect of task demands and artificially manipulated object salience on visual attention in real world scenes.” 2008. Thesis, University of Edinburgh. Accessed March 06, 2021.
http://hdl.handle.net/1842/2901.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Welensky, Zachary. “The effect of task demands and artificially manipulated object salience on visual attention in real world scenes.” 2008. Web. 06 Mar 2021.
Vancouver:
Welensky Z. The effect of task demands and artificially manipulated object salience on visual attention in real world scenes. [Internet] [Thesis]. University of Edinburgh; 2008. [cited 2021 Mar 06].
Available from: http://hdl.handle.net/1842/2901.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Welensky Z. The effect of task demands and artificially manipulated object salience on visual attention in real world scenes. [Thesis]. University of Edinburgh; 2008. Available from: http://hdl.handle.net/1842/2901
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Waterloo
4.
Hathibelagal, Amithavikram.
Objective assessment of Visual acuity in infants.
Degree: 2013, University of Waterloo
URL: http://hdl.handle.net/10012/7681
► Purpose Early detection of abnormal visual acuity (VA) is crucial in the identification and management of ocular and visual abnormalities in infants. Currently, the Teller…
(more)
▼ Purpose
Early detection of abnormal visual acuity (VA) is crucial in the identification and management of ocular and visual abnormalities in infants. Currently, the Teller Acuity Cards (TACs) are considered the gold standard for clinical testing and are effective in obtaining a quick estimate of an infant’s VA, but they have certain drawbacks. They rely on a subjective assessment of the baby’s looking behavior. Despite this, TACs have been found to have good validity and repeatability.
The current study investigates a new method to objectively assess visual acuity in infants, which is uses a video gaze tracker (GT) and computer-generated stimuli, developed in the lab of M. Eizenman at the University of Toronto. The purpose was to validate this method in adults and infants against current clinical VA tests. Visual scanning patterns were measured by the GT system that requires minimal subject cooperation in adult and infant populations. The targets were judged as seen when the relative fixation time on the grating exceeded a pre-determined threshold, as compared to the fixation time on the luminance-matched background.
Methods
Experiment 1: In 15 uncorrected myopic adults, binocular grating VA was measured. The targets were square-wave gratings of spatial frequency ranging from 2.3 to 37 cpd presented randomly in one of four positions on the screen. There were 6 objective protocols (in which VA was judged by fixations). The subjects were naïve, as the only instruction given to the participants was to look towards the screen. The experimenter, who presented the gratings also acted as an observer by making judgments of seen/not seen responses using the objective information provided by the software. Objective GT VA was compared with VA measured with subjective responses using the same stimuli and with Teller Acuity Cards (TACs).
Experiment 2: Binocular grating VA for horizontal gratings was measured in 20 typically-developing infants aged 3 to 12 months. Spatial frequency ranged from 0.32 to 42 cpd and VA was measured on two visits with both the GT and TACs. A staircase protocol was used to obtain the VA threshold in the GT. The experimenter controlled the staircase method and an observer used the objective information of visual fixations using the software to judge if the grating was seen or not. Video cartoons were shown between stimulus presentations to keep the infant’s attention towards the screen.
VA was also measured with the TACs held in the vertical orientation, so that the gratings were horizontal, similar to the GT method. A TAC stage was specially designed with a vertical slot in which the cards could be presented. The observer was masked regarding the participant’s age and the starting spatial frequency. The study co-ordinator determined the choice of the start card which was randomized between participants so as to give an equal number of participants with each start card. The same start card was used for the second session of each infant. The threshold was defined as the highest spatial…
Subjects/Keywords: visual acuity; infants; gaze tracking
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hathibelagal, A. (2013). Objective assessment of Visual acuity in infants. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/7681
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Hathibelagal, Amithavikram. “Objective assessment of Visual acuity in infants.” 2013. Thesis, University of Waterloo. Accessed March 06, 2021.
http://hdl.handle.net/10012/7681.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Hathibelagal, Amithavikram. “Objective assessment of Visual acuity in infants.” 2013. Web. 06 Mar 2021.
Vancouver:
Hathibelagal A. Objective assessment of Visual acuity in infants. [Internet] [Thesis]. University of Waterloo; 2013. [cited 2021 Mar 06].
Available from: http://hdl.handle.net/10012/7681.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Hathibelagal A. Objective assessment of Visual acuity in infants. [Thesis]. University of Waterloo; 2013. Available from: http://hdl.handle.net/10012/7681
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Aberdeen
5.
Nowakowska, Anna Maria.
Visual search strategies under normal viewing conditions, and under conditions that simulate visual field deficit.
Degree: PhD, 2018, University of Aberdeen
URL: https://abdn.alma.exlibrisgroup.com/view/delivery/44ABE_INST/12152404820005941
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760008
► A cardinal role of selective visual attention is to serve our action by selecting all the relevant information. One task that has been applied extensively…
(more)
▼ A cardinal role of selective visual attention is to serve our action by selecting all the relevant information. One task that has been applied extensively to explore attention is visual search for a target among distractors. Given the extensive practice of human observers with visual search, and its ecological relevance, one could expect a high level of efficiency when performing visual search tasks. Indeed, a prominent in the literature Ideal Observer model (Najemnik & Geisler, 2005, 2008) suggests, that human visual system is extremely efficient, in that every eye movement during visual search is executed to the locations that could be expected to yield maximum information; similarly to the Ideal Observer, humans require the minimum number of eye moments possible to find the target (Najemnik & Geisler, 2005, 2008). The present programme of research tests the prediction of the Ideal Observer model (Najemnik & Geisler, 2005, 2008) against a simpler, but similarly effective stochastic selection model (Clarke, Green, Chantler, & Hunt, 2016), by examining human visual search strategies under normal viewing conditions, and conditions that simulate visual field deficit. Across nine experiments, I observed strikingly inefficient search behaviour that speaks against the assumptions of the Ideal Observer model. Although on the surface these cumulative results appear to be in line with the random process of fixation selection (Clarke et al., 2016), such conclusion appears to be valid only for the observed group results. The individual observer's data that was carefully documented in each of the experiments did not allow such a conclusion. The individual observers' data showed full spectrum of search strategies, with some observers being extremely efficient, some being average searchers, and others applying a very inefficient strategy. The large individual differences between participants suggest that the fixation selection process is neither optimal nor random, but rather idiosyncratic.
Subjects/Keywords: 150; Visual perception; Eye tracking
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nowakowska, A. M. (2018). Visual search strategies under normal viewing conditions, and under conditions that simulate visual field deficit. (Doctoral Dissertation). University of Aberdeen. Retrieved from https://abdn.alma.exlibrisgroup.com/view/delivery/44ABE_INST/12152404820005941 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760008
Chicago Manual of Style (16th Edition):
Nowakowska, Anna Maria. “Visual search strategies under normal viewing conditions, and under conditions that simulate visual field deficit.” 2018. Doctoral Dissertation, University of Aberdeen. Accessed March 06, 2021.
https://abdn.alma.exlibrisgroup.com/view/delivery/44ABE_INST/12152404820005941 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760008.
MLA Handbook (7th Edition):
Nowakowska, Anna Maria. “Visual search strategies under normal viewing conditions, and under conditions that simulate visual field deficit.” 2018. Web. 06 Mar 2021.
Vancouver:
Nowakowska AM. Visual search strategies under normal viewing conditions, and under conditions that simulate visual field deficit. [Internet] [Doctoral dissertation]. University of Aberdeen; 2018. [cited 2021 Mar 06].
Available from: https://abdn.alma.exlibrisgroup.com/view/delivery/44ABE_INST/12152404820005941 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760008.
Council of Science Editors:
Nowakowska AM. Visual search strategies under normal viewing conditions, and under conditions that simulate visual field deficit. [Doctoral Dissertation]. University of Aberdeen; 2018. Available from: https://abdn.alma.exlibrisgroup.com/view/delivery/44ABE_INST/12152404820005941 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760008

Texas A&M University
6.
Li, Wen.
Exploring Motion Signatures for Vision-Based Tracking, Recognition and Navigation.
Degree: PhD, Computer Engineering, 2014, Texas A&M University
URL: http://hdl.handle.net/1969.1/153285
► As cameras become more and more popular in intelligent systems, algorithms and systems for understanding video data become more and more important. There is a…
(more)
▼ As cameras become more and more popular in intelligent systems, algorithms and systems for understanding video data become more and more important. There is a broad range of applications, including object detection,
tracking, scene understanding, and robot navigation. Besides the stationary information, video data contains rich motion information of the environment. Biological
visual systems, like human and animal eyes, are very sensitive to the motion information. This inspires active research on vision-based motion analysis in recent years. The main focus of motion analysis has been on low level motion representations of pixels and image regions. However, the motion signatures can benefit a broader range of applications if further in-depth analysis techniques are developed.
In this dissertation, we mainly discuss how to exploit motion signatures to solve problems in two applications: object recognition and robot navigation.
First, we use bird species recognition as the application to explore motion signatures for object recognition. We begin with study of the periodic wingbeat motion of flying birds. To analyze the wing motion of a flying bird, we establish kinematics models for bird wings, and obtain wingbeat periodicity in image frames after the perspective projection. Time series of salient extremities on bird images are extracted, and the wingbeat frequency is acquired for species classification. Physical experiments show that the frequency based recognition method is robust to segmentation errors and measurement lost up to 30%. In addition to the wing motion, the body motion of the bird is also analyzed to extract the flying velocity in 3D space. An interacting multi-model approach is then designed to capture the combined object motion patterns and different environment conditions. The
proposed systems and algorithms are tested in physical experiments, and the results show a false positive rate of around 20% with a low false negative rate close to zero.
Second, we explore motion signatures for vision-based vehicle navigation. We discover that motion vectors (MVs) encoded in Moving Picture Experts Group (MPEG) videos provide rich information of the motion in the environment, which can be used to reconstruct the vehicle ego-motion and the structure of the scene. However, MVs suffer from high noise level. To handle the challenge, an error propagation model for MVs is first proposed. Several steps, including MV merging, plane-at-infinity elimination, and planar region extraction, are designed to further reduce noises. The extracted planes are used as landmarks in an extended Kalman filter (EKF) for simultaneous localization and mapping. Results show that the algorithm performs localization and plane mapping with a relative
trajectory error below 5:1%.
Exploiting the fact that MVs encodes both environment information and moving obstacles, we further propose to track moving objects at the same time of localization and mapping. This enables the two critical navigation functionalities, localization and obstacle…
Advisors/Committee Members: Song, Dezhen (advisor), Ioerger, Thomas (committee member), Shell, Dylan (committee member), Yan, Wei (committee member).
Subjects/Keywords: Motion Signature; Visual Tracking; Visual Navigation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Li, W. (2014). Exploring Motion Signatures for Vision-Based Tracking, Recognition and Navigation. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/153285
Chicago Manual of Style (16th Edition):
Li, Wen. “Exploring Motion Signatures for Vision-Based Tracking, Recognition and Navigation.” 2014. Doctoral Dissertation, Texas A&M University. Accessed March 06, 2021.
http://hdl.handle.net/1969.1/153285.
MLA Handbook (7th Edition):
Li, Wen. “Exploring Motion Signatures for Vision-Based Tracking, Recognition and Navigation.” 2014. Web. 06 Mar 2021.
Vancouver:
Li W. Exploring Motion Signatures for Vision-Based Tracking, Recognition and Navigation. [Internet] [Doctoral dissertation]. Texas A&M University; 2014. [cited 2021 Mar 06].
Available from: http://hdl.handle.net/1969.1/153285.
Council of Science Editors:
Li W. Exploring Motion Signatures for Vision-Based Tracking, Recognition and Navigation. [Doctoral Dissertation]. Texas A&M University; 2014. Available from: http://hdl.handle.net/1969.1/153285
7.
Kikuchi, Davi Yoshinobu.
Sistema de controle servo visual de uma câmera pan-tilt com rastreamento de uma região de referência.
Degree: Mestrado, Engenharia de Controle e Automação Mecânica, 2007, University of São Paulo
URL: http://www.teses.usp.br/teses/disponiveis/3/3152/tde-27072007-163810/
;
► Uma câmera pan-tilt é capaz de se movimentar em torno de dois eixos de rotação (pan e tilt), permitindo que sua lente possa ser apontada…
(more)
▼ Uma câmera pan-tilt é capaz de se movimentar em torno de dois eixos de rotação (pan e tilt), permitindo que sua lente possa ser apontada para um ponto qualquer no espaço. Uma aplicação possível dessa câmera é mantê-la apontada para um determinado alvo em movimento, através de posicionamentos angulares pan e tilt adequados. Este trabalho apresenta uma técnica de controle servo visual, em que, inicialmente, as imagens capturadas pela câmera são utilizadas para determinar a posição do alvo. Em seguida, calculam-se as rotações necessárias para manter a projeção do alvo no centro da imagem, em um sistema em tempo real e malha fechada. A técnica de rastreamento visual desenvolvida se baseia em comparação de uma região de referência, utilizando a soma dos quadrados das diferenças (SSD) como critério de correspondência. Sobre essa técnica, é adicionada uma extensão baseada no princípio de estimação incremental e, em seguida, o algoritmo é mais uma vez modificado através do princípio de estimação em multiresolução. Para cada uma das três configurações, são realizados testes para comparar suas performances. O sistema é modelado através do princípio de fluxo óptico e dois controladores são apresentados para realimentar o sistema: um proporcional integral (PI) e um proporcional com estimação de perturbações externas através de um filtro de Kalman (LQG). Ambos são calculados utilizando um critério linear quadrático e os desempenhos deles também são analisados comparativamente.
A pan-tilt camera can move around two rotational axes (pan and tilt), allowing its lens to be pointed to any point in space. A possible application of the camera is to keep it pointed to a certain moving target, through appropriate angular pan-tilt positioning. This work presents a visual servoing technique, which uses first the images captured by the camera to determinate the target position. Then the method calculates the proper rotations to keep the target position in image center, establishing a real-time and closed-loop system. The developed visual tracking technique is based on template region matching, and makes use of the sum of squared differences (SSD) as similarity criterion. An extension based on incremental estimation principle is added to the technique, and then the algorithm is modified again by multiresolution estimation method. Experimental results allow a performance comparison between the three configurations. The system is modeled through optical flow principle and this work presents two controllers to accomplish the system feedback: a proportional integral (PI) and a proportional with external disturbances estimation by a Kalman filter (LQG). Both are determined using a linear quadratic method and their performances are also analyzed comparatively.
Advisors/Committee Members: Moscato, Lucas Antonio.
Subjects/Keywords: Controle linear quadrático; Controle servo visual; Linear quadratic control; Rastreamento visual; Visual servoing; Visual tracking
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kikuchi, D. Y. (2007). Sistema de controle servo visual de uma câmera pan-tilt com rastreamento de uma região de referência. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/3/3152/tde-27072007-163810/ ;
Chicago Manual of Style (16th Edition):
Kikuchi, Davi Yoshinobu. “Sistema de controle servo visual de uma câmera pan-tilt com rastreamento de uma região de referência.” 2007. Masters Thesis, University of São Paulo. Accessed March 06, 2021.
http://www.teses.usp.br/teses/disponiveis/3/3152/tde-27072007-163810/ ;.
MLA Handbook (7th Edition):
Kikuchi, Davi Yoshinobu. “Sistema de controle servo visual de uma câmera pan-tilt com rastreamento de uma região de referência.” 2007. Web. 06 Mar 2021.
Vancouver:
Kikuchi DY. Sistema de controle servo visual de uma câmera pan-tilt com rastreamento de uma região de referência. [Internet] [Masters thesis]. University of São Paulo; 2007. [cited 2021 Mar 06].
Available from: http://www.teses.usp.br/teses/disponiveis/3/3152/tde-27072007-163810/ ;.
Council of Science Editors:
Kikuchi DY. Sistema de controle servo visual de uma câmera pan-tilt com rastreamento de uma região de referência. [Masters Thesis]. University of São Paulo; 2007. Available from: http://www.teses.usp.br/teses/disponiveis/3/3152/tde-27072007-163810/ ;

Tulane University
8.
Fears, Nicholas.
The development of handwriting in young children.
Degree: 2019, Tulane University
URL: https://digitallibrary.tulane.edu/islandora/object/tulane:89283
► [email protected]
Despite the increasing use of keyboards in the classroom, handwriting is still considered a fundamental skill that young children need to master to succeed…
(more)
▼ [email protected]
Despite the increasing use of keyboards in the classroom, handwriting is still considered a fundamental skill that young children need to master to succeed in most areas of the elementary school curriculum. Children’s school readiness is determined by an array of cognitive, perceptual, and motor abilities that provide the foundation for academic success. These foundational abilities must be integrated for efficient handwriting and a failure of this integration predicts later academic achievement. When children begin writing, they develop from producing incoherent lines to producing letters that are more common in their language or are found in their names. Children must then learn to produce the remaining letters in their alphabet to become proficient writers. The process that children use to master the letters of an alphabet is not well understood. Previous research has focused primarily on the production of handwriting as a single skill, yet the production of handwriting entails a process in which children must integrate visual, fine motor, and basic reading skills to produce letters and words. The process of handwriting also develops in an environment that is full of letters and words. To date, the literature on handwriting has failed to address the processes that children utilize during handwriting, how these processes change through children’s development, and how the environment children are developing in influences these processes. This dissertation provides a theoretically integrative account of children’s handwriting development. The objectives of this dissertation are to determine the letter frequencies in children’s picture books, determine the opportunities that children are presented to copy letters in handwriting workbooks, measure the influence of change in grade and growth of basic reading skills on children’s visual processing development during handwriting, and measure visual-motor integration during handwriting. The approach to test these objectives is to integrate methods from educational and developmental psychology literatures in a novel series of studies using content analyses of children’s educational resources, head-mounted eye-tracking and academic assessments. By understanding the interaction between cognitive, linguistic, visual, and motor processes, researchers may establish possible mechanisms for the process of children’s development of complex skills, such as handwriting.
1
Nicholas E. Fears
Advisors/Committee Members: (author), Lockman, Jeffrey (Thesis advisor), (Thesis advisor), School of Science & Engineering Psychology (Degree granting institution), NULL (Degree granting institution).
Subjects/Keywords: Handwriting; Eye-tracking; visual-motor integration
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to Zotero / EndNote / Reference
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APA (6th Edition):
Fears, N. (2019). The development of handwriting in young children. (Thesis). Tulane University. Retrieved from https://digitallibrary.tulane.edu/islandora/object/tulane:89283
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Fears, Nicholas. “The development of handwriting in young children.” 2019. Thesis, Tulane University. Accessed March 06, 2021.
https://digitallibrary.tulane.edu/islandora/object/tulane:89283.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fears, Nicholas. “The development of handwriting in young children.” 2019. Web. 06 Mar 2021.
Vancouver:
Fears N. The development of handwriting in young children. [Internet] [Thesis]. Tulane University; 2019. [cited 2021 Mar 06].
Available from: https://digitallibrary.tulane.edu/islandora/object/tulane:89283.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fears N. The development of handwriting in young children. [Thesis]. Tulane University; 2019. Available from: https://digitallibrary.tulane.edu/islandora/object/tulane:89283
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
9.
Fiez, Trevor.
An Analysis of Training Methodologies for Deep Visual Trackers.
Degree: MS, 2017, Oregon State University
URL: http://hdl.handle.net/1957/61584
► This thesis considers the problem of training convolutional neural networks for online visual tracking. A major challenge for single object visual tracking is that most…
(more)
▼ This thesis considers the problem of training convolutional neural networks for online
visual tracking. A major challenge for single object
visual tracking is that most training sets with frame-level track annotations are quite small, due to the prohibitive cost of manual annotation. Current training approaches either supplement the annotations with other data sources (e.g., object-detection training data) or generate noisy variants of the track annotations. In either case, the data generation and training methods have ignored the fact that
tracking involves sequences of decisions (one per frame) that are dependent on one another. Thus, the objectives optimized by these learning algorithms are not directly tied to the end goal of
tracking performance. To further study this issue, we consider the state-of-the-art imitation learning algorithm, DAGGER, for training an online tracker. We observe that the DAGGER faces difficulty when applied to
tracking, because online trackers typically experience unrecoverable failures, especially early in training. To rectify this issue we introduce, analyze, and evaluate a variation of DAGGER, called DAGGER with Resets (DAGGERsuperscript{2}), a novel imitation learning framework which maintains the theoretical properties of DAGGER and is more appropriate for training deep trackers. Our main contribution is to compare different training methods, including DAGGER and DAGGERsuperscript{2}, across a variety of datasets and multiple trackers. Our experimental results show this principled training approach and methodical random augmentation is able to outperform existing training approaches across multiple
visual tracking datasets.
Advisors/Committee Members: Fern, Alan (advisor), Li, Fuxin (committee member).
Subjects/Keywords: Visual Tracking
…to address
the lack of visual tracking data for training has been to supplement the… …know that loss in visual tracking strongly depends on a sequence of previously
made decisions… …the
track.
Visual tracking networks can be split into two groups: ones that learn a… …CNNs for visual tracking. However, since tracking is a series of sequential
decisions, the… …track. Algorithm 1 is the pseudocode used to train a neural network for
visual tracking…
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Fiez, T. (2017). An Analysis of Training Methodologies for Deep Visual Trackers. (Masters Thesis). Oregon State University. Retrieved from http://hdl.handle.net/1957/61584
Chicago Manual of Style (16th Edition):
Fiez, Trevor. “An Analysis of Training Methodologies for Deep Visual Trackers.” 2017. Masters Thesis, Oregon State University. Accessed March 06, 2021.
http://hdl.handle.net/1957/61584.
MLA Handbook (7th Edition):
Fiez, Trevor. “An Analysis of Training Methodologies for Deep Visual Trackers.” 2017. Web. 06 Mar 2021.
Vancouver:
Fiez T. An Analysis of Training Methodologies for Deep Visual Trackers. [Internet] [Masters thesis]. Oregon State University; 2017. [cited 2021 Mar 06].
Available from: http://hdl.handle.net/1957/61584.
Council of Science Editors:
Fiez T. An Analysis of Training Methodologies for Deep Visual Trackers. [Masters Thesis]. Oregon State University; 2017. Available from: http://hdl.handle.net/1957/61584

University of Manitoba
10.
Fahimi, Ramin.
Sequential selection, saliency and scanpaths.
Degree: Computer Science, 2018, University of Manitoba
URL: http://hdl.handle.net/1993/33571
► Visual saliency and eye movements have been well studied, mostly in the capacity of predicting topographical spatial saliency maps. In this thesis, we examine the…
(more)
▼ Visual saliency and eye movements have been well studied, mostly in the capacity of predicting topographical spatial saliency maps. In this thesis, we examine the problem of sequential selection and sampling of image content in detail. Careful scrutiny is applied to existing metrics for measuring success of sequential selection strategies, and a new family of metrics is proposed with an intuitive interpretation and that provides more discriminative power in revealing differences between viewing patterns or computational models. This is accompanied by experimentation based on classic strategies for simulating sequential selection from traditional representations of saliency, and deep neural networks that produce sequences by construction. Experiments provide strong support for the necessity of sequential analysis of attention and a roadmap for moving forward.
Advisors/Committee Members: Bruce, Neil (Computer Science) (supervisor), Wang, Yang (Computer science) Morrison, Jason (Biosystems Engineering) (examiningcommittee).
Subjects/Keywords: eye-tracking; Saliency; visual-attention; scanpath
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Fahimi, R. (2018). Sequential selection, saliency and scanpaths. (Masters Thesis). University of Manitoba. Retrieved from http://hdl.handle.net/1993/33571
Chicago Manual of Style (16th Edition):
Fahimi, Ramin. “Sequential selection, saliency and scanpaths.” 2018. Masters Thesis, University of Manitoba. Accessed March 06, 2021.
http://hdl.handle.net/1993/33571.
MLA Handbook (7th Edition):
Fahimi, Ramin. “Sequential selection, saliency and scanpaths.” 2018. Web. 06 Mar 2021.
Vancouver:
Fahimi R. Sequential selection, saliency and scanpaths. [Internet] [Masters thesis]. University of Manitoba; 2018. [cited 2021 Mar 06].
Available from: http://hdl.handle.net/1993/33571.
Council of Science Editors:
Fahimi R. Sequential selection, saliency and scanpaths. [Masters Thesis]. University of Manitoba; 2018. Available from: http://hdl.handle.net/1993/33571

Louisiana State University
11.
Brown, Noelle L.
The relationship between visual attention and prospective memory.
Degree: PhD, Psychology, 2011, Louisiana State University
URL: etd-11112011-115315
;
https://digitalcommons.lsu.edu/gradschool_dissertations/461
► The current study examined the role of attention in prospective memory. Prospective memory refers to the ability to form an intention to do something in…
(more)
▼ The current study examined the role of attention in prospective memory. Prospective memory refers to the ability to form an intention to do something in the future, such as email a colleague, and additionally remembering to do so at the appropriate moment. Theories of prospective memory retrieval suggest that attention is required to complete an intention. However, the exact role of attention and whether it is always required remains unclear. One challenge in examining the allocation of attentional resources in prospective memory is that a direct measure of these resources does not exist. The current study attempted to address this issue by introducing methods applied in the area of visual attention (i.e., eye tracking). The results of the current study suggest that attentional resources beyond those required for the ongoing task were not necessary to complete the intention. In addition, the methods employed shed new light on the relationship between visual attention and the cognitive resources deployed in a prospective memory task.
Subjects/Keywords: eye tracking; monitoring; visual attention; prospective memory
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❌
APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Brown, N. L. (2011). The relationship between visual attention and prospective memory. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-11112011-115315 ; https://digitalcommons.lsu.edu/gradschool_dissertations/461
Chicago Manual of Style (16th Edition):
Brown, Noelle L. “The relationship between visual attention and prospective memory.” 2011. Doctoral Dissertation, Louisiana State University. Accessed March 06, 2021.
etd-11112011-115315 ; https://digitalcommons.lsu.edu/gradschool_dissertations/461.
MLA Handbook (7th Edition):
Brown, Noelle L. “The relationship between visual attention and prospective memory.” 2011. Web. 06 Mar 2021.
Vancouver:
Brown NL. The relationship between visual attention and prospective memory. [Internet] [Doctoral dissertation]. Louisiana State University; 2011. [cited 2021 Mar 06].
Available from: etd-11112011-115315 ; https://digitalcommons.lsu.edu/gradschool_dissertations/461.
Council of Science Editors:
Brown NL. The relationship between visual attention and prospective memory. [Doctoral Dissertation]. Louisiana State University; 2011. Available from: etd-11112011-115315 ; https://digitalcommons.lsu.edu/gradschool_dissertations/461

Delft University of Technology
12.
Blom, Jari (author).
Onboard Visual Control of a Quadcopter MAV performing a Landing Task: on a Platform of Unknown Size and Location.
Degree: 2019, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:57cfce9e-75aa-42f1-bed4-64b64b927fb4
► Vision based control allows Micro Air Vehicles (MAV) to move autonomously in GPS-denied environments, for example in indoor applications. An open issue in this field…
(more)
▼ Vision based control allows Micro Air Vehicles (MAV) to move autonomously in GPS-denied environments, for example in indoor applications. An open issue in this field is landing on an unknown platform. The difficulty in
visual control w.r.t. such an unknown platform, is a lack of scale. Without knowledge of the scale of offsets and object sizes (without height knowledge from GPS) it is difficult to determine an appropriate response from the controller. A control algorithm is designed to fit these requirements using an adaptation of an optical flow divergence based landing scheme, combined with an Image Based
Visual Servoing approach applied to features in the Virtual Camera. The approach leads to satisfactory behavior in Gazebo simulations. It results in a robust controller for a range of starting heights and divergence settings.
Advisors/Committee Members: de Croon, Guido (graduation committee), Scheper, K.Y.W. (mentor), Delft University of Technology (degree granting institution).
Subjects/Keywords: Autonomous; Drone; Visual Servoing; Optical Flow; Tracking
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Blom, J. (. (2019). Onboard Visual Control of a Quadcopter MAV performing a Landing Task: on a Platform of Unknown Size and Location. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:57cfce9e-75aa-42f1-bed4-64b64b927fb4
Chicago Manual of Style (16th Edition):
Blom, Jari (author). “Onboard Visual Control of a Quadcopter MAV performing a Landing Task: on a Platform of Unknown Size and Location.” 2019. Masters Thesis, Delft University of Technology. Accessed March 06, 2021.
http://resolver.tudelft.nl/uuid:57cfce9e-75aa-42f1-bed4-64b64b927fb4.
MLA Handbook (7th Edition):
Blom, Jari (author). “Onboard Visual Control of a Quadcopter MAV performing a Landing Task: on a Platform of Unknown Size and Location.” 2019. Web. 06 Mar 2021.
Vancouver:
Blom J(. Onboard Visual Control of a Quadcopter MAV performing a Landing Task: on a Platform of Unknown Size and Location. [Internet] [Masters thesis]. Delft University of Technology; 2019. [cited 2021 Mar 06].
Available from: http://resolver.tudelft.nl/uuid:57cfce9e-75aa-42f1-bed4-64b64b927fb4.
Council of Science Editors:
Blom J(. Onboard Visual Control of a Quadcopter MAV performing a Landing Task: on a Platform of Unknown Size and Location. [Masters Thesis]. Delft University of Technology; 2019. Available from: http://resolver.tudelft.nl/uuid:57cfce9e-75aa-42f1-bed4-64b64b927fb4
13.
Bae, Gi Yeul.
Correspondence computations in visual cognition.
Degree: 2014, Johns Hopkins University
URL: http://jhir.library.jhu.edu/handle/1774.2/37062
► 15 behavioral experiments were conducted to investigate the role of object correspondence computations in visual cognition. Correspondence computations refer, here, to algorithms that identify relationships…
(more)
▼ 15 behavioral experiments were conducted to investigate the role of object correspondence computations in
visual cognition. Correspondence computations refer, here, to algorithms that identify relationships between objects in temporally separate encounters. In Experiment 1-5, I hypothesized that
tracking failures occur because of correspondence failures during close encounters of targets and nontargets. To test this idea, I provided observers with different surface feature information to nontargets whenever they approached within 4° of a target (Experiment 1). This manipulation significantly improved performance by alleviating correspondence challenges. Two control experiments showed that this color change benefit is not merely due to target recovery (Experiment 2 and 4). A follow-up experiment measured the distance at which objects correspondence becomes challenging (Experiment 3). And an additional experiment demonstrated that the overall frequency of
target-nontarget close encounters predict human performance (Experiment 5). Experiment 6-10 explored the role of object correspondence in the context of spatial working memory. Experiment 6 supplied evidence of object correspondences in a typical spatial working memory task through a trial specific analysis. In addition, a model that implements correspondence algorithms successfully predicted human performance without assuming any independent memory-related limits. Experiments 7 and 8 employed a preview display that indirectly provided information about memory location to be tested. This manipulation improved SWM performance dramatically (e.g. performance with 8 objects were comparable to 2 objects). A control experiment showed that the improved performance is not due to mere reactivation of memory representations (Experiment 9). Additional experiment showed that object colors do not support correspondence computations in this context. Experiment 11-15 employed integral features to
prevent correspondence failures in a
visual working memory task. I reasoned that integral features can be used to solve correspondence problems by preventing confusions between objects. Experiment 11 and 12 independently identified integral features using perceptual sorting experiments. When these features were used in change judgment tasks, working memory with two objects produced performance as precise as with one (Experiments 13-15). Taken together, these results suggest that object correspondence play a crucial role in the constraints typically observed in
visual cognition.
Advisors/Committee Members: Gross, Steven (advisor).
Subjects/Keywords: Visual cognition;
visual working memory;
multiple object tracking;
correspondence problems;
vision
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bae, G. Y. (2014). Correspondence computations in visual cognition. (Thesis). Johns Hopkins University. Retrieved from http://jhir.library.jhu.edu/handle/1774.2/37062
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Bae, Gi Yeul. “Correspondence computations in visual cognition.” 2014. Thesis, Johns Hopkins University. Accessed March 06, 2021.
http://jhir.library.jhu.edu/handle/1774.2/37062.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Bae, Gi Yeul. “Correspondence computations in visual cognition.” 2014. Web. 06 Mar 2021.
Vancouver:
Bae GY. Correspondence computations in visual cognition. [Internet] [Thesis]. Johns Hopkins University; 2014. [cited 2021 Mar 06].
Available from: http://jhir.library.jhu.edu/handle/1774.2/37062.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Bae GY. Correspondence computations in visual cognition. [Thesis]. Johns Hopkins University; 2014. Available from: http://jhir.library.jhu.edu/handle/1774.2/37062
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Clemson University
14.
Shipley, Nathan James.
The Bee's Knees or Spines of a Spider: What Makes an 'Insect' Interesting?.
Degree: MS, Parks, Recreation, and Tourism Management, 2017, Clemson University
URL: https://tigerprints.clemson.edu/all_theses/2674
► Insects and their kin (bugs) are among the most detested and despised creatures on earth. Irrational fears of these mostly harmless organisms often restrict and…
(more)
▼ Insects and their kin (bugs) are among the most detested and despised creatures on earth. Irrational fears of these mostly harmless organisms often restrict and prevent opportunities for outdoor recreation and leisure. Alternatively, Shipley and Bixler (2016) theorize that direct and positive experiences with bugs during middle childhood may result in fascination with insects leading to comfort in wildland settings. The objective of this research was to examine and identify the novel and unfamiliar bug types that people are more likely to find interesting and visually attend to when spontaneously presented with their images. This research examined these questions through four integrated exploratory studies. The first study (n = 216) found that a majority of adults are unfamiliar with a majority of bugs, despite the abundance of many common but "˜unfamiliar' bugs. The second (n = 15) and third (n = 308) study examined participant's first impressions of unfamiliar bugs. The second study consisted of in-depth interviews, while the third study had participants report their perceptions of bugs across multiple emotional dimensions. Together, both studies suggest there are many unfamiliar bugs that are perceptually novel and perceived as interesting when encountered. The fourth study (n = 48) collected metrics of
visual attention using eye-
tracking by measuring
visual fixations while participants viewed different bugs identified through previous studies as either being interesting or disinteresting. The findings of the fourth study suggest that interesting bugs can capture more
visual attention than uninteresting bugs. Results from all four studies provide a heuristic for interpretive naturalists, magazine editors, marketers, public relation advisors, filmmakers, and any other
visual communication professional that can be used in the choice of images of unfamiliar images of insects and other small invertebrates to evoke situational interest and motivate subsequent behavior.
Advisors/Committee Members: Dr. Robert D. Bixler, Committee Chair, Dr. Dorothy L. Schmalz, Dr. Cynthia L.S. Pury.
Subjects/Keywords: bugs; eye tracking; insects; novelty; visual attention; visual communications
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Shipley, N. J. (2017). The Bee's Knees or Spines of a Spider: What Makes an 'Insect' Interesting?. (Masters Thesis). Clemson University. Retrieved from https://tigerprints.clemson.edu/all_theses/2674
Chicago Manual of Style (16th Edition):
Shipley, Nathan James. “The Bee's Knees or Spines of a Spider: What Makes an 'Insect' Interesting?.” 2017. Masters Thesis, Clemson University. Accessed March 06, 2021.
https://tigerprints.clemson.edu/all_theses/2674.
MLA Handbook (7th Edition):
Shipley, Nathan James. “The Bee's Knees or Spines of a Spider: What Makes an 'Insect' Interesting?.” 2017. Web. 06 Mar 2021.
Vancouver:
Shipley NJ. The Bee's Knees or Spines of a Spider: What Makes an 'Insect' Interesting?. [Internet] [Masters thesis]. Clemson University; 2017. [cited 2021 Mar 06].
Available from: https://tigerprints.clemson.edu/all_theses/2674.
Council of Science Editors:
Shipley NJ. The Bee's Knees or Spines of a Spider: What Makes an 'Insect' Interesting?. [Masters Thesis]. Clemson University; 2017. Available from: https://tigerprints.clemson.edu/all_theses/2674

Louisiana State University
15.
Goldstein, Rebecca Rose.
Exploring the Relationship between Long-Term Memory and Attention through Attentional Templates.
Degree: PhD, Psychology, 2016, Louisiana State University
URL: etd-06212016-124300
;
https://digitalcommons.lsu.edu/gradschool_dissertations/267
► It is assumed that the contents of visual working memory (VWM) guide attention. This notion has been challenged by work which has demonstrated that multiple…
(more)
▼ It is assumed that the contents of visual working memory (VWM) guide attention. This notion has been challenged by work which has demonstrated that multiple searches for the same target changes contralateral delay activity (CDA), an event-related potential that is the putative marker of the amount of information maintained in VWM. It has been suggested that the disappearance of the CDA with an invariable target marks the transfer of the attentional template from VWM storage to long-term memory (LTM) storage. Therefore, LTM may guide attention in many situations where it has previously been assumed that VWM guides attention. However, while the transfer of attentional template from VWM to LTM is demonstrated through a decrease in the amplitude of the CDA, this shift has not been accompanied by a corresponding behavioral change in response times. The purpose of the present study was to test the hypothesis that a LTM template leads to faster performance than a VWM template (the LTM template hypothesis). Two experiments were conducted to explore this hypothesis. In Experiment 1, the LTM template hypothesis was examined by comparing performance between two different groups of subjects: the first group searched for a target that changed on every trial (variable) while the second group searched for a target that was invariable across trials. In Experiment 2, one group of subjects searched for both the variable and invariable targets. The results showed that a LTM template (invariable target search) leads to faster performance than a VWM template (variable target search). Roughly six times as many trials were required for an effect on performance compared to the number of trials required for an effect in CDA amplitude. Eye tracking results suggest the change in performance is due to more efficient search initiation and target verification.
Subjects/Keywords: visual search; eye tracking; long-term memory; attentional templates; visual attention
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Goldstein, R. R. (2016). Exploring the Relationship between Long-Term Memory and Attention through Attentional Templates. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-06212016-124300 ; https://digitalcommons.lsu.edu/gradschool_dissertations/267
Chicago Manual of Style (16th Edition):
Goldstein, Rebecca Rose. “Exploring the Relationship between Long-Term Memory and Attention through Attentional Templates.” 2016. Doctoral Dissertation, Louisiana State University. Accessed March 06, 2021.
etd-06212016-124300 ; https://digitalcommons.lsu.edu/gradschool_dissertations/267.
MLA Handbook (7th Edition):
Goldstein, Rebecca Rose. “Exploring the Relationship between Long-Term Memory and Attention through Attentional Templates.” 2016. Web. 06 Mar 2021.
Vancouver:
Goldstein RR. Exploring the Relationship between Long-Term Memory and Attention through Attentional Templates. [Internet] [Doctoral dissertation]. Louisiana State University; 2016. [cited 2021 Mar 06].
Available from: etd-06212016-124300 ; https://digitalcommons.lsu.edu/gradschool_dissertations/267.
Council of Science Editors:
Goldstein RR. Exploring the Relationship between Long-Term Memory and Attention through Attentional Templates. [Doctoral Dissertation]. Louisiana State University; 2016. Available from: etd-06212016-124300 ; https://digitalcommons.lsu.edu/gradschool_dissertations/267
16.
Minvielle, Morgane.
Influence de la complexité visuelle du packaging sur le comportement des consommateurs : effets médiateur de l’attention et modérateur de l’âge : Influence of product package visual complexity on consumer behavior : the mediating effect of attention and moderating effect of age.
Degree: Docteur es, Sciences de gestion, 2017, Rennes 1
URL: http://www.theses.fr/2017REN1G022
► Cette recherche a pour objectif d’étudier l’influence de la complexité visuelle du packaging, opérationnalisée par le nombre d’informations figurant sur le facing, sur les réactions…
(more)
▼ Cette recherche a pour objectif d’étudier l’influence de la complexité visuelle du packaging, opérationnalisée par le nombre d’informations figurant sur le facing, sur les réactions des consommateurs et plus précisément sur l’attention consacrée au packaging et à la marque, sur l’attitude envers le produit et le choix du produit ainsi que sur la mémorisation. Les éventuels effets médiateur de l’attention portée au packaging et modérateur de l’âge sur ces relations ont également été investigués.Pour ce faire, une expérimentation eye-tracking regroupant les données de plus de cent participants a été réalisée. Cette expérimentation a mis en jeu quatre packagings dans chacune de quatre catégories de produits, chaque packaging présentant deux degrés de complexité visuelle : un packaging simple présentant quatre unités d’information en plus de la marque et de l’image et un packaging complexe présentant neuf unités d’information en plus de la marque et de l’image. Deux tâches ont, en outre, été effectuées par chaque participant : une tâche d’évaluation des produits, lors de laquelle les packagings étaient présentés un par un, et une tâche de choix, lors de laquelle les packagings étaient présentés ensemble sur un set de choix.Les résultats ont montré un effet positif de la complexité visuelle du packaging sur l’attention portée au packaging et un effet opposé, selon la tâche/modalité de présentation des packagings, sur l’attention à la marque. La complexité visuelle a également eu un effet positif sur l’attitude envers le produit et sur le choix du produit, l’effet positif sur le choix étant médiatisé par l’attention : les packagings complexes ont été évalués plus positivement que les packagings simples et ils ont également été davantage regardés, ce qui explique qu’ils ont été plus choisis. En ce qui concerne les mesures explicites de mémorisation, les résultats ont été plus divers. La complexité n’a pas eu d’effet sur la reconnaissance exacte des marques. En revanche, concernant les packagings, les résultats ont été non concordants entre les tâches/modalités de présentation des packagings. En tâche d’évaluation (packagings présentés un par un), une absence d’effet de la complexité a ainsi été constatée alors qu’en tâche de choix de produit (packagings présentés par quatre), un effet positif de la complexité sur la reconnaissance exacte des packagings, effet médiatisé par l’attention, et un effet positif de la complexité sur la fausse reconnaissance des packagings ont été constatés. Par ailleurs, de façon surprenante, dans une très large majorité des cas l’âge n’a pas eu d’effet sur l’attention portée, ni au packaging ni à la marque. Les résultats ont par contre confirmé l’effet négatif de l’âge sur les mesures explicites de mémorisation.
The goal of this research is to study the influence of product package visual complexity, operationalized as the number of information items displayed on the package front, upon consumers’ reactions, and more specifically attention devoted to the product package and to the brand,…
Advisors/Committee Members: Droulers, Olivier (thesis director).
Subjects/Keywords: Complexité visuelle; Packaging; Attention; Vieillissement; Eye-Tracking; Visual complexity; Product package; Attention; Aging; Eye-Tracking
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APA ·
Chicago ·
MLA ·
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APA (6th Edition):
Minvielle, M. (2017). Influence de la complexité visuelle du packaging sur le comportement des consommateurs : effets médiateur de l’attention et modérateur de l’âge : Influence of product package visual complexity on consumer behavior : the mediating effect of attention and moderating effect of age. (Doctoral Dissertation). Rennes 1. Retrieved from http://www.theses.fr/2017REN1G022
Chicago Manual of Style (16th Edition):
Minvielle, Morgane. “Influence de la complexité visuelle du packaging sur le comportement des consommateurs : effets médiateur de l’attention et modérateur de l’âge : Influence of product package visual complexity on consumer behavior : the mediating effect of attention and moderating effect of age.” 2017. Doctoral Dissertation, Rennes 1. Accessed March 06, 2021.
http://www.theses.fr/2017REN1G022.
MLA Handbook (7th Edition):
Minvielle, Morgane. “Influence de la complexité visuelle du packaging sur le comportement des consommateurs : effets médiateur de l’attention et modérateur de l’âge : Influence of product package visual complexity on consumer behavior : the mediating effect of attention and moderating effect of age.” 2017. Web. 06 Mar 2021.
Vancouver:
Minvielle M. Influence de la complexité visuelle du packaging sur le comportement des consommateurs : effets médiateur de l’attention et modérateur de l’âge : Influence of product package visual complexity on consumer behavior : the mediating effect of attention and moderating effect of age. [Internet] [Doctoral dissertation]. Rennes 1; 2017. [cited 2021 Mar 06].
Available from: http://www.theses.fr/2017REN1G022.
Council of Science Editors:
Minvielle M. Influence de la complexité visuelle du packaging sur le comportement des consommateurs : effets médiateur de l’attention et modérateur de l’âge : Influence of product package visual complexity on consumer behavior : the mediating effect of attention and moderating effect of age. [Doctoral Dissertation]. Rennes 1; 2017. Available from: http://www.theses.fr/2017REN1G022

Queen Mary, University of London
17.
Biresaw, Tewodros Atanaw.
Self-correcting Bayesian target tracking.
Degree: PhD, 2015, Queen Mary, University of London
URL: http://qmro.qmul.ac.uk/xmlui/handle/123456789/7925
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.658668
► Visual tracking, a building block for many applications, has challenges such as occlusions,illumination changes, background clutter and variable motion dynamics that may degrade the tracking…
(more)
▼ Visual tracking, a building block for many applications, has challenges such as occlusions,illumination changes, background clutter and variable motion dynamics that may degrade the tracking performance and are likely to cause failures. In this thesis, we propose Track-Evaluate-Correct framework (self-correlation) for existing trackers in order to achieve a robust tracking. For a tracker in the framework, we embed an evaluation block to check the status of tracking quality and a correction block to avoid upcoming failures or to recover from failures. We present a generic representation and formulation of the self-correcting tracking for Bayesian trackers using a Dynamic Bayesian Network (DBN). The self-correcting tracking is done similarly to a selfaware system where parameters are tuned in the model or different models are fused or selected in a piece-wise way in order to deal with tracking challenges and failures. In the DBN model representation, the parameter tuning, fusion and model selection are done based on evaluation and correction variables that correspond to the evaluation and correction, respectively. The inferences of variables in the DBN model are used to explain the operation of self-correcting tracking. The specific contributions under the generic self-correcting framework are correlation-based selfcorrecting tracking for an extended object with model points and tracker-level fusion as described below. For improving the probabilistic tracking of extended object with a set of model points, we use Track-Evaluate-Correct framework in order to achieve self-correcting tracking. The framework combines the tracker with an on-line performance measure and a correction technique. We correlate model point trajectories to improve on-line the accuracy of a failed or an uncertain tracker. A model point tracker gets assistance from neighbouring trackers whenever degradation in its performance is detected using the on-line performance measure. The correction of the model point state is based on the correlation information from the states of other trackers. Partial Least Square regression is used to model the correlation of point tracker states from short windowed trajectories adaptively. Experimental results on data obtained from optical motion capture systems show the improvement in tracking performance of the proposed framework compared to the baseline tracker and other state-of-the-art trackers. The proposed framework allows appropriate re-initialisation of local trackers to recover from failures that are caused by clutter and missed detections in the motion capture data. Finally, we propose a tracker-level fusion framework to obtain self-correcting tracking. The fusion framework combines trackers addressing different tracking challenges to improve the overall performance. As a novelty of the proposed framework, we include an online performance measure to identify the track quality level of each tracker to guide the fusion. The trackers in the framework assist each other based on appropriate mixing of the prior…
Subjects/Keywords: 629.8; visual tracking; Track-Evaluate- Correct framework; Dynamic Bayesian Networks; self-correcting tracking.
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Biresaw, T. A. (2015). Self-correcting Bayesian target tracking. (Doctoral Dissertation). Queen Mary, University of London. Retrieved from http://qmro.qmul.ac.uk/xmlui/handle/123456789/7925 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.658668
Chicago Manual of Style (16th Edition):
Biresaw, Tewodros Atanaw. “Self-correcting Bayesian target tracking.” 2015. Doctoral Dissertation, Queen Mary, University of London. Accessed March 06, 2021.
http://qmro.qmul.ac.uk/xmlui/handle/123456789/7925 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.658668.
MLA Handbook (7th Edition):
Biresaw, Tewodros Atanaw. “Self-correcting Bayesian target tracking.” 2015. Web. 06 Mar 2021.
Vancouver:
Biresaw TA. Self-correcting Bayesian target tracking. [Internet] [Doctoral dissertation]. Queen Mary, University of London; 2015. [cited 2021 Mar 06].
Available from: http://qmro.qmul.ac.uk/xmlui/handle/123456789/7925 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.658668.
Council of Science Editors:
Biresaw TA. Self-correcting Bayesian target tracking. [Doctoral Dissertation]. Queen Mary, University of London; 2015. Available from: http://qmro.qmul.ac.uk/xmlui/handle/123456789/7925 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.658668
18.
Ban, Yutong.
Suivi multi-locuteurs avec information audio-visuel pour la perception du robot : audio-visual multiple-speaker tracking for robot perception.
Degree: Docteur es, Mathématiques et informatique, 2019, Université Grenoble Alpes (ComUE)
URL: http://www.theses.fr/2019GREAM017
► La perception des robots joue un rôle crucial dans l’interaction homme-robot (HRI). Le système de perception fournit les informations au robot sur l’environnement, ce qui…
(more)
▼ La perception des robots joue un rôle crucial dans l’interaction homme-robot (HRI). Le système de perception fournit les informations au robot sur l’environnement, ce qui permet au robot de réagir en consequence. Dans un scénario de conversation, un groupe de personnes peut discuter devant le robot et se déplacer librement. Dans de telles situations, les robots sont censés comprendre où sont les gens, ceux qui parlent et de quoi ils parlent. Cette thèse se concentre sur les deux premières questions, à savoir le suivi et la diarisation des locuteurs. Nous utilisons différentes modalités du système de perception du robot pour remplir cet objectif. Comme pour l’humain, l’ouie et la vue sont essentielles pour un robot dans un scénario de conversation. Les progrès de la vision par ordinateur et du traitement audio de la dernière décennie ont révolutionné les capacités de perception des robots. Dans cette thèse, nous développons les contributions suivantes : nous développons d’abord un cadre variationnel bayésien pour suivre plusieurs objets. Le cadre bayésien variationnel fournit des solutions explicites, rendant le processus de suivi très efficace. Cette approche est d’abord appliqué au suivi visuel de plusieurs personnes. Les processus de créations et de destructions sont en adéquation avec le modèle probabiliste proposé pour traiter un nombre variable de personnes. De plus, nous exploitons la complémentarité de la vision et des informations du moteur du robot : d’une part, le mouvement actif du robot peut être intégré au système de suivi visuel pour le stabiliser ; d’autre part, les informations visuelles peuvent être utilisées pour effectuer l’asservissement du moteur. Par la suite, les informations audio et visuelles sont combinées dans le modèle variationnel, pour lisser les trajectoires et déduire le statut acoustique d’une personne : parlant ou silencieux. Pour expérimenter un scenario où l’information visuelle est absente, nous essayons le modèle pour la localisation et le suivi des locuteurs basé sur l’information acoustique uniquement. Les techniques de déréverbération sont d’abord appliquées, dont le résultat est fourni au système de suivi. Enfin, une variante du modèle de suivi des locuteurs basée sur la distribution de von-Mises est proposée, celle-ci étant plus adaptée aux données directionnelles. Toutes les méthodes proposées sont validées sur des bases de données specifiques à chaque application.
Robot perception plays a crucial role in human-robot interaction (HRI). Perception system provides the robot information of the surroundings and enables the robot to give feedbacks. In a conversational scenario, a group of people may chat in front of the robot and move freely. In such situations, robots are expected to understand where are the people, who are speaking, or what are they talking about. This thesis concentrates on answering the first two questions, namely speaker tracking and diarization. We use different modalities of the robot’s perception system to achieve the goal. Like seeing and hearing for…
Advisors/Committee Members: Horaud, Radu (thesis director), Alameda-Pineda, Xavier (thesis director).
Subjects/Keywords: Audio-Visuels; Tracking; Robots humanoïdes; Inférence variationnel; Audio-Visual; Tracking; Robot; Variational inference; 004
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ban, Y. (2019). Suivi multi-locuteurs avec information audio-visuel pour la perception du robot : audio-visual multiple-speaker tracking for robot perception. (Doctoral Dissertation). Université Grenoble Alpes (ComUE). Retrieved from http://www.theses.fr/2019GREAM017
Chicago Manual of Style (16th Edition):
Ban, Yutong. “Suivi multi-locuteurs avec information audio-visuel pour la perception du robot : audio-visual multiple-speaker tracking for robot perception.” 2019. Doctoral Dissertation, Université Grenoble Alpes (ComUE). Accessed March 06, 2021.
http://www.theses.fr/2019GREAM017.
MLA Handbook (7th Edition):
Ban, Yutong. “Suivi multi-locuteurs avec information audio-visuel pour la perception du robot : audio-visual multiple-speaker tracking for robot perception.” 2019. Web. 06 Mar 2021.
Vancouver:
Ban Y. Suivi multi-locuteurs avec information audio-visuel pour la perception du robot : audio-visual multiple-speaker tracking for robot perception. [Internet] [Doctoral dissertation]. Université Grenoble Alpes (ComUE); 2019. [cited 2021 Mar 06].
Available from: http://www.theses.fr/2019GREAM017.
Council of Science Editors:
Ban Y. Suivi multi-locuteurs avec information audio-visuel pour la perception du robot : audio-visual multiple-speaker tracking for robot perception. [Doctoral Dissertation]. Université Grenoble Alpes (ComUE); 2019. Available from: http://www.theses.fr/2019GREAM017
19.
Scekic, Ana.
L’influence de l'encombrement visuel sur les expériences de recherche et de choix des consommateurs : The influence of visual crowding on consumers’ search and choice experiences.
Degree: Docteur es, Sciences de Gestion, 2020, Jouy-en Josas, HEC
URL: http://www.theses.fr/2020EHEC0010
► Dans cette thèse, j'examine l'influence de l'encombrement visuel sur la recherche et le choix des produits par les consommateurs. L'encombrement visuel réduit la capacité des…
(more)
▼ Dans cette thèse, j'examine l'influence de l'encombrement visuel sur la recherche et le choix des produits par les consommateurs. L'encombrement visuel réduit la capacité des individus de distinguer les objets d'une scène les uns des autres, rendant ainsi la recherche et le choix des produits plus difficiles. Dans le premier chapitre, je montre que la capacité des individus de trouver un produit cible particulier dans un assortiment varie en fonction de l'enchâssement du produit cible, qui dépend des emplacements des produits cibles et non cibles dans l’assortiment. Je propose une métrique qui quantifie l'encombrement visuel pour le produit cible à chaque emplacement possible dans un assortiment, et qui peut être utilisée pour estimer la quantité d'effort de recherche visuelle nécessaire pour trouver le produit cible. Dans le deuxième chapitre, j'examine l'impact de l'encombrement visuel sur le choix - en particulier, comment la réduction de l'encombrement visuel, en ajoutant de l'espace entre les produits dans un assortiment, influence les perceptions de la variété et le comportement d'achat. Dans le troisième chapitre, j'explore l'attention visuelle en présence de différents distracteurs dans un assortiment. Dans l'ensemble, dans cette thèse, j'essaie de déterminer quels éléments de la présentation des produits peuvent réduire l'encombrement visuel et améliorer les expériences d'achat des consommateurs. Cette recherche contribue à la littérature sur l'attention visuelle et les assortiments, et fournit de nouvelles perspectives pour la présentation des produits, dans les environnements de vente en ligne et hors ligne.
In this dissertation, I examine the influence of visual crowding on consumers’ product search and choice. Visual crowding reduces individuals’ ability to distinguish objects in a scene from one another, thus making product search and choice more difficult. In the first chapter, I show that individuals’ ability to find a particular target product in a display varies in function of the embeddedness of the target, which depends on the locations of the target and non-target products in the display. I propose a metric that quantifies how visually crowded a target is in each location of a given product display, and that can be used to estimate the amount of visual search effort needed to find the target. In the second chapter, I examine how visual crowding impacts choice – specifically, how reducing visual crowding by adding space between products in an assortment influences variety perceptions and purchase behavior. In the third chapter, I explore visual attention to a product display in presence of different distractors. Overall, in this dissertation I try to ascertain which elements of product displays can reduce visual crowding and improve consumers’ shopping experiences. This research contributes to the literature on visual attention and assortments, and provides new insights for product display designs, in online and offline retail environments.
Advisors/Committee Members: Ebbes, Peter (thesis director), Atalay, Selin (thesis director).
Subjects/Keywords: Encombrement visuel; Recherche visuelle; Assortiments; Variété perçue; Eye tracking; Visual crowding; Visual search; Assortments; Perceived variety; Eye tracking
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Scekic, A. (2020). L’influence de l'encombrement visuel sur les expériences de recherche et de choix des consommateurs : The influence of visual crowding on consumers’ search and choice experiences. (Doctoral Dissertation). Jouy-en Josas, HEC. Retrieved from http://www.theses.fr/2020EHEC0010
Chicago Manual of Style (16th Edition):
Scekic, Ana. “L’influence de l'encombrement visuel sur les expériences de recherche et de choix des consommateurs : The influence of visual crowding on consumers’ search and choice experiences.” 2020. Doctoral Dissertation, Jouy-en Josas, HEC. Accessed March 06, 2021.
http://www.theses.fr/2020EHEC0010.
MLA Handbook (7th Edition):
Scekic, Ana. “L’influence de l'encombrement visuel sur les expériences de recherche et de choix des consommateurs : The influence of visual crowding on consumers’ search and choice experiences.” 2020. Web. 06 Mar 2021.
Vancouver:
Scekic A. L’influence de l'encombrement visuel sur les expériences de recherche et de choix des consommateurs : The influence of visual crowding on consumers’ search and choice experiences. [Internet] [Doctoral dissertation]. Jouy-en Josas, HEC; 2020. [cited 2021 Mar 06].
Available from: http://www.theses.fr/2020EHEC0010.
Council of Science Editors:
Scekic A. L’influence de l'encombrement visuel sur les expériences de recherche et de choix des consommateurs : The influence of visual crowding on consumers’ search and choice experiences. [Doctoral Dissertation]. Jouy-en Josas, HEC; 2020. Available from: http://www.theses.fr/2020EHEC0010

Technical University of Lisbon
20.
Rodrigues, Ana Catarina Pereira.
Influência da alteração do tamanho de estímulos visuais na captação da atenção dos consumidores.
Degree: 2016, Technical University of Lisbon
URL: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/12920
► Mestrado em Marketing
A atenção que os consumidores têm para os elementos que constituem um anúncio publicitário é bastante importante na forma como este é…
(more)
▼ Mestrado em Marketing
A atenção que os consumidores têm para os elementos que constituem um anúncio publicitário é bastante importante na forma como este é elaborado, sendo que um dos aspetos importantes é o tamanho desses elementos. Esta dissertação tem como objetivo perceber se o tamanho dos elementos (produto e personagem) de um anúncio publicitário tem influência na atenção dos consumidores.
A metodologia utilizada foi quantitativa e o propósito é exploratório, uma vez que se pretende analisar o efeito do tamanho dos pontos de interesse - produto e personagem - num anúncio publicitário na atenção do consumidor. Assim, foram usadas duas imagens referentes a dois diferentes tipos de produto (Commodity e Luxo), sendo as que mesmas foram alteradas de duas formas diferentes (aumento do produto e aumento da personagem). Estas imagens foram visualizadas por 37 inquiridos com recurso a um equipamento de Eye Tracking.
Os resultados permitiram observar que a atenção do consumidor é influenciada não só para o elemento alterado como também para o elemento não alterado presente na imagem. Em função dos resultados obtidos conclui-se que as empresas devem reconhecer a importância do tamanho dos elementos, tendo em conta o que pretendem comunicar e o objetivo dessa comunicação.
Consumer's attention to the ad's elements is of utmost importance when designing the ad and one of the important aspects is the size of these elements. The main purpose of this master thesis is to understand if the size of the ad's elements affects the customers' attention.
The methodology was qualitative and quantitative and the purpose is exploratory, as it aims to explore the influence of the size of the advertisement's elements (product and character) on the consumer's attention. Therefore, two images related to two different types of product (Commodity and Luxury) were used. These images were modified in two different ways: increase the size of the product and the size of the character. 37 participants looked at these images using an Eye Tracking device.
Results showed that the size of the product and the size of the character have a big influence on consumer's attention to the element itself and the attention to the other element. In summary, companies must consider the importance of the size of the elements depending on its communication's objectives.
info:eu-repo/semantics/publishedVersion
Advisors/Committee Members: Veríssimo, José.
Subjects/Keywords: Eye tracking; tamanho; atenção; estímulos visuais; size; attention; visual perception; visual stimuli
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APA (6th Edition):
Rodrigues, A. C. P. (2016). Influência da alteração do tamanho de estímulos visuais na captação da atenção dos consumidores. (Thesis). Technical University of Lisbon. Retrieved from http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/12920
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Rodrigues, Ana Catarina Pereira. “Influência da alteração do tamanho de estímulos visuais na captação da atenção dos consumidores.” 2016. Thesis, Technical University of Lisbon. Accessed March 06, 2021.
http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/12920.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Rodrigues, Ana Catarina Pereira. “Influência da alteração do tamanho de estímulos visuais na captação da atenção dos consumidores.” 2016. Web. 06 Mar 2021.
Vancouver:
Rodrigues ACP. Influência da alteração do tamanho de estímulos visuais na captação da atenção dos consumidores. [Internet] [Thesis]. Technical University of Lisbon; 2016. [cited 2021 Mar 06].
Available from: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/12920.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Rodrigues ACP. Influência da alteração do tamanho de estímulos visuais na captação da atenção dos consumidores. [Thesis]. Technical University of Lisbon; 2016. Available from: http://www.rcaap.pt/detail.jsp?id=oai:www.repository.utl.pt:10400.5/12920
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rochester Institute of Technology
21.
Sridharan, Srinivas.
Gaze Guidance, Task-Based Eye Movement Prediction, and Real-World Task Inference using Eye Tracking.
Degree: PhD, 2016, Rochester Institute of Technology
URL: https://scholarworks.rit.edu/theses/9164
► The ability to predict and guide viewer attention has important applications in computer graphics, image understanding, object detection, visual search and training. Human eye…
(more)
▼ The ability to predict and guide viewer attention has important applications in computer graphics, image understanding, object detection,
visual search and training. Human eye movements provide insight into the cognitive processes involved in task performance and there has been extensive research on what factors guide viewer attention in a scene. It has been shown, for example, that saliency in the image, scene context, and task at hand play significant roles in guiding attention.
This dissertation presents and discusses research on
visual attention with specific focus on the use of subtle
visual cues to guide viewer gaze and the development of algorithms to predict the distribution of gaze about a scene. Specific contributions of this work include: a framework for gaze guidance to enable problem solving and spatial learning, a novel algorithm for task-based eye movement prediction, and a system for real-world task inference using eye
tracking.
A gaze guidance approach is presented that combines eye
tracking with subtle image-space modulations to guide viewer gaze about a scene. Several experiments were conducted using this approach to examine its impact on short-term spatial information recall, task sequencing, training, and password recollection. A model of human
visual attention prediction that uses saliency maps, scene feature maps and task-based eye movements to predict regions of interest was also developed. This model was used to automatically select target regions for active gaze guidance to improve search task performance. Finally, we develop a framework for inferring real-world tasks using image features and eye movement data.
Overall, this dissertation naturally leads to an overarching framework, that combines all three contributions to provide a continuous feedback system to improve performance on repeated
visual search tasks. This research has important applications in data visualization, problem solving, training, and online education.
Advisors/Committee Members: Reynold Bailey.
Subjects/Keywords: Applied perception; Eye tracking; Gaze guidance; Spatial learning; Visual attention; Visual task inference
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sridharan, S. (2016). Gaze Guidance, Task-Based Eye Movement Prediction, and Real-World Task Inference using Eye Tracking. (Doctoral Dissertation). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/9164
Chicago Manual of Style (16th Edition):
Sridharan, Srinivas. “Gaze Guidance, Task-Based Eye Movement Prediction, and Real-World Task Inference using Eye Tracking.” 2016. Doctoral Dissertation, Rochester Institute of Technology. Accessed March 06, 2021.
https://scholarworks.rit.edu/theses/9164.
MLA Handbook (7th Edition):
Sridharan, Srinivas. “Gaze Guidance, Task-Based Eye Movement Prediction, and Real-World Task Inference using Eye Tracking.” 2016. Web. 06 Mar 2021.
Vancouver:
Sridharan S. Gaze Guidance, Task-Based Eye Movement Prediction, and Real-World Task Inference using Eye Tracking. [Internet] [Doctoral dissertation]. Rochester Institute of Technology; 2016. [cited 2021 Mar 06].
Available from: https://scholarworks.rit.edu/theses/9164.
Council of Science Editors:
Sridharan S. Gaze Guidance, Task-Based Eye Movement Prediction, and Real-World Task Inference using Eye Tracking. [Doctoral Dissertation]. Rochester Institute of Technology; 2016. Available from: https://scholarworks.rit.edu/theses/9164

Universidade Presbiteriana Mackenzie
22.
Renata de Lima Velloso.
Reconhecimento dos conceitos de forma, cor, tamanho e posição em 10 crianças com Síndrome de Rett.
Degree: 2008, Universidade Presbiteriana Mackenzie
URL: http://tede.mackenzie.com.br//tde_busca/arquivo.php?codArquivo=725
► Crianças com Síndrome de Rett (SR) apresentam regressão progressiva do desenvolvimento psicomotor e das habilidades de linguagem verbal e perda das habilidades manuais voluntárias, o…
(more)
▼ Crianças com Síndrome de Rett (SR) apresentam regressão progressiva do desenvolvimento psicomotor e das habilidades de linguagem verbal e perda das habilidades manuais voluntárias, o que lhes dificulta a comunicação. Estudos relatam que meninas com SR utilizam o olhar com finalidade intencional, como forma de comunicação ou de expressão de desejos, o que levanta a possibilidade de avaliação de outros aspectos por meio do olhar, como os aspectos cognitivos. O objetivo deste estudo foi avaliar, em crianças com SR, o reconhecimento dos conceitos de cor (vermelho, amarelo e azul), forma (círculo, quadrado e triângulo), tamanho (grande e pequeno) e posição espacial (em cima e embaixo), com a utilização de equipamento computadorizado de rastreamento ocular. Participaram do estudo 10 crianças com diagnóstico de SR com idade entre 4 anos e 8 meses e 12 anos e 10 meses. Comparando-se o tempo de fixação do olhar das crianças para o conceito solicitado com o tempo de fixação para outros conceitos não solicitados, os resultados não indicaram muitas diferenças significativas. Houve correlação entre o conceito cor "azul" e o aumento da idade, indicando que as crianças mais velhas aprendem o conceito "azul". Concluiu-se que, com o método de avaliação utilizado, as crianças não reconheceram a maior parte dos conceitos de cor, forma, tamanho e posição.
Children with Rett Syndrome (RS) are supposed to present progressive regression of psychomotor development and speech abilities as well as spontaneous hand movement loss, resulting in severe difficulties for their communication. Several studies have been reporting that RS girls use the eyes with intentional purpose for communicating or expressing desires, and these findings make possible the use of eyes movements as a tool for assessing other RS aspects, such as the cognitive aspects. Ten girls aged 4y8m to 12y10m with RS were assessed for this investigation with a computer system for visual tracking regarding their ability of recognizing concepts of color (red, yellow and blue), shape (circle, square and triangle), size (big and small) and spatial position (over and under). Results from comparing the time of eyes fixation on required and not required concepts did not differ significantly. Correlation between age advancement and ability for recognizing the concept of the color "blue" could be observed. Children did not show to recognize the most part of the required concepts when assessed with eye tracking system.
Advisors/Committee Members: José Salomão Schwartzman, Geraldo Antônio Fiamenghi Jr, Ceres Alves de Araujo.
Subjects/Keywords: cognição; visual tracking; cognition; rastreamento visual; Rett syndrome; PSICOLOGIA; síndrome de Rett
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Velloso, R. d. L. (2008). Reconhecimento dos conceitos de forma, cor, tamanho e posição em 10 crianças com Síndrome de Rett. (Thesis). Universidade Presbiteriana Mackenzie. Retrieved from http://tede.mackenzie.com.br//tde_busca/arquivo.php?codArquivo=725
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Velloso, Renata de Lima. “Reconhecimento dos conceitos de forma, cor, tamanho e posição em 10 crianças com Síndrome de Rett.” 2008. Thesis, Universidade Presbiteriana Mackenzie. Accessed March 06, 2021.
http://tede.mackenzie.com.br//tde_busca/arquivo.php?codArquivo=725.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Velloso, Renata de Lima. “Reconhecimento dos conceitos de forma, cor, tamanho e posição em 10 crianças com Síndrome de Rett.” 2008. Web. 06 Mar 2021.
Vancouver:
Velloso RdL. Reconhecimento dos conceitos de forma, cor, tamanho e posição em 10 crianças com Síndrome de Rett. [Internet] [Thesis]. Universidade Presbiteriana Mackenzie; 2008. [cited 2021 Mar 06].
Available from: http://tede.mackenzie.com.br//tde_busca/arquivo.php?codArquivo=725.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Velloso RdL. Reconhecimento dos conceitos de forma, cor, tamanho e posição em 10 crianças com Síndrome de Rett. [Thesis]. Universidade Presbiteriana Mackenzie; 2008. Available from: http://tede.mackenzie.com.br//tde_busca/arquivo.php?codArquivo=725
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

McMaster University
23.
Rivard, Lisa M.
Looking and seeing: How do school-aged children with and without developmental coordination disorder integrate vision and attention during visuomotor performance?.
Degree: PhD, 2015, McMaster University
URL: http://hdl.handle.net/11375/17406
► This dissertation explores how children with and without developmental coordination disorder (DCD) ‘look’ and ‘see’: how they integrate vision and attention to guide arm and…
(more)
▼ This dissertation explores how children with and without developmental coordination disorder (DCD) ‘look’ and ‘see’: how they integrate vision and attention to guide arm and hand movements during a visuomotor task. Chapter 1 provides the thesis context, reviewing the vision and attention literature, outlining the role of these processes in motor performance, and reviewing what is known about vision and attention in children with DCD. Chapter 1 includes a discussion on eye tracking to measure visual attention, and outlines the thesis purpose and objectives.Chapter 2 focuses on children with DCD, detailing their presentation and clinical management. This chapter serves to increase the reader’s understanding of the difficulties children with DCD experience, and to demonstrate the need for intervention to prevent the profound consequences that can impact their quality of life. Chapter 3 presents a study that explores how children with and without DCD employ vision and attention to accomplish a visuomotor task in a natural setting, using a novel eye tracking design. Highlighted here are important differences during visuomotor task performance: compared to their peers, children with DCD did not use predictive gaze to attend to relevant task objects, but rather used vision to guide their arm/hand throughout the task. Chapter 4 outlines lessons learned from using an eye tracker with children with DCD, describing the children for whom eye tracking was not reliable, and discussing equipment and participant factors that impact eye tracker use. Recommendations for future research using eye tracking with the DCD population are provided. Finally, Chapter 5 discusses the clinical and research implications of the studies conducted here. Insights gained regarding visual attention differences between children with and without DCD are discussed in the context of interventions to improve health outcomes in children with DCD and the design of future eye tracking studies.
Dissertation
Doctor of Philosophy (PhD)
Advisors/Committee Members: Missiuna, Cheryl, Health Sciences.
Subjects/Keywords: developmental coordination disorder; school-age; selective visual attention; eye tracking; visual difficulties; internal models
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Rivard, L. M. (2015). Looking and seeing: How do school-aged children with and without developmental coordination disorder integrate vision and attention during visuomotor performance?. (Doctoral Dissertation). McMaster University. Retrieved from http://hdl.handle.net/11375/17406
Chicago Manual of Style (16th Edition):
Rivard, Lisa M. “Looking and seeing: How do school-aged children with and without developmental coordination disorder integrate vision and attention during visuomotor performance?.” 2015. Doctoral Dissertation, McMaster University. Accessed March 06, 2021.
http://hdl.handle.net/11375/17406.
MLA Handbook (7th Edition):
Rivard, Lisa M. “Looking and seeing: How do school-aged children with and without developmental coordination disorder integrate vision and attention during visuomotor performance?.” 2015. Web. 06 Mar 2021.
Vancouver:
Rivard LM. Looking and seeing: How do school-aged children with and without developmental coordination disorder integrate vision and attention during visuomotor performance?. [Internet] [Doctoral dissertation]. McMaster University; 2015. [cited 2021 Mar 06].
Available from: http://hdl.handle.net/11375/17406.
Council of Science Editors:
Rivard LM. Looking and seeing: How do school-aged children with and without developmental coordination disorder integrate vision and attention during visuomotor performance?. [Doctoral Dissertation]. McMaster University; 2015. Available from: http://hdl.handle.net/11375/17406

Queens University
24.
Nematallah, Heba.
Adaptive Vison Aided Integrated Navigation For Dynamic Unknown Environments
.
Degree: Electrical and Computer Engineering, 2016, Queens University
URL: http://hdl.handle.net/1974/13935
► In this research, a novel method for visual odometry (VO) and the integration with multi-sensors navigation systems for vehicular platforms is proposed. The proposed method…
(more)
▼ In this research, a novel method for visual odometry (VO) and the integration with multi-sensors navigation systems for vehicular platforms is proposed. The proposed method partitions the field of single camera view into regions of interests where each region likely contains different types of visual features. By applying computer vision processing techniques, ambiguous pose estimation is calculated up to a scale factor. The proposed method uses aiding measurements from vehicle’s odometer to adaptively resolve the scale factor ambiguity problem in monocular camera systems. Unlike some state-of-art approaches, this work does not depend on offline pre-processing or predefined landmarks or visual maps. In addition, this work addresses unknown uncontrolled environments where moving objects likely exist. Innovative odometer-aided Local Bundle Adjustment (LBA) along with a fuzzy C-mean clustering mechanism is proposed to reject outliers corresponding to moving objects. A Gaussian Mixture approach is also applied to detect visual background regions during stationary periods which enables further rejection of moving objects. Finally, an empirical scoring method is applied to calculate a matching score of the different visual features and to use this score in a Kalman filter as measurement covariance noise to integrate VO-estimated pose changes within a larger multi-sensors integrated navigation system. Experimental work was performed with a physical vehicular platform equipped by MEMS inertial sensors, GPS, speed measurements and GPS-enabled camera. The experimental work includes three testing vehicular trajectories in downtown Toronto and the surrounding areas. The experimental work showed significant navigation improvements during long GPS outages where only VO is fused with inertial sensors and the vehicle’s speed measurements.
Subjects/Keywords: Visual Odometry
;
Scale Invariant Feature Tracking
;
Monocular Visual Odometry
;
Extended Kalman Filter
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nematallah, H. (2016). Adaptive Vison Aided Integrated Navigation For Dynamic Unknown Environments
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/13935
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Nematallah, Heba. “Adaptive Vison Aided Integrated Navigation For Dynamic Unknown Environments
.” 2016. Thesis, Queens University. Accessed March 06, 2021.
http://hdl.handle.net/1974/13935.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Nematallah, Heba. “Adaptive Vison Aided Integrated Navigation For Dynamic Unknown Environments
.” 2016. Web. 06 Mar 2021.
Vancouver:
Nematallah H. Adaptive Vison Aided Integrated Navigation For Dynamic Unknown Environments
. [Internet] [Thesis]. Queens University; 2016. [cited 2021 Mar 06].
Available from: http://hdl.handle.net/1974/13935.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Nematallah H. Adaptive Vison Aided Integrated Navigation For Dynamic Unknown Environments
. [Thesis]. Queens University; 2016. Available from: http://hdl.handle.net/1974/13935
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
25.
Martinez Benavides , John Jairo.
A Vision Based Algorithm for the Guidance of a Glider
.
Degree: 2014, Universidad de los Andes
URL: http://documentodegrado.uniandes.edu.co/documentos/201122698_fecha_2013_06_25_parte_1.pdf
► En esta tesis se propone un algoritmo de visión para ayudar al sistema de guiado de un vehículo aéreo no tripulado (UAV). Específicamente, se considera…
(more)
▼ En esta tesis se propone un algoritmo de visión para ayudar al sistema de guiado de un vehículo aéreo no tripulado (UAV). Específicamente, se considera un planeador no tripulado que intenta aterrizar en una zona objetivo. Ya que el UAV está cayendo rápido, la escala de las imágenes capturadas por la cámara a bordo crece. Las dinámicas del vehículo y el algoritmo de control causan cambios rápidos en la región observada por la cámara y en la manera que se proyecta en el plano de la imagen. Se propone un algoritmo con base en puntos característicos SURF y transformaciones de proyección. El algoritmo estima la coordenada durante el vuelo del planeador. Se realizaron muchas simulaciones en diferentes tipos de escenarios. Las simulaciones se usaron para caracterizar el tipo de zonas en donde el algoritmo es útil para guiar al planeador. Los resultados mostraron que el algoritmo entrega una estimación de la posición precisa en varios tipos de escenarios, permitiendo que el sistema de control guie al planeador a la zona objetivo.
Advisors/Committee Members: Hernandez Peñaloza Jose Tiberio (advisor), Carlos Francisco Rodríguez (advisor).
Subjects/Keywords: Visual Tracking;
UAV;
Visual Guidance;
SURF
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Martinez Benavides , J. J. (2014). A Vision Based Algorithm for the Guidance of a Glider
. (Thesis). Universidad de los Andes. Retrieved from http://documentodegrado.uniandes.edu.co/documentos/201122698_fecha_2013_06_25_parte_1.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Martinez Benavides , John Jairo. “A Vision Based Algorithm for the Guidance of a Glider
.” 2014. Thesis, Universidad de los Andes. Accessed March 06, 2021.
http://documentodegrado.uniandes.edu.co/documentos/201122698_fecha_2013_06_25_parte_1.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Martinez Benavides , John Jairo. “A Vision Based Algorithm for the Guidance of a Glider
.” 2014. Web. 06 Mar 2021.
Vancouver:
Martinez Benavides JJ. A Vision Based Algorithm for the Guidance of a Glider
. [Internet] [Thesis]. Universidad de los Andes; 2014. [cited 2021 Mar 06].
Available from: http://documentodegrado.uniandes.edu.co/documentos/201122698_fecha_2013_06_25_parte_1.pdf.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Martinez Benavides JJ. A Vision Based Algorithm for the Guidance of a Glider
. [Thesis]. Universidad de los Andes; 2014. Available from: http://documentodegrado.uniandes.edu.co/documentos/201122698_fecha_2013_06_25_parte_1.pdf
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
26.
Delabarre, Bertrand.
Contributions to dense visual tracking and visual servoing using robust similarity criteria : Contributions au suivi visuel et à l'asservissement visuel denses basées sur des critères de similarité robustes.
Degree: Docteur es, Informatique, 2014, Rennes 1
URL: http://www.theses.fr/2014REN1S124
► Dans cette thèse, nous traitons les problèmes de suivi visuel et d'asservissement visuel, qui sont des thèmes essentiels dans le domaine de la vision par…
(more)
▼ Dans cette thèse, nous traitons les problèmes de suivi visuel et d'asservissement visuel, qui sont des thèmes essentiels dans le domaine de la vision par ordinateur. La plupart des techniques de suivi et d'asservissement visuel présentes dans la littérature se basent sur des primitives géométriques extraites dans les images pour estimer le mouvement présent dans la séquence. Un problème inhérent à ce type de méthode est le fait de devoir extraire et mettre en correspondance des primitives à chaque nouvelle image avant de pouvoir estimer un déplacement. Afin d'éviter cette couche algorithmique et de considérer plus d'information visuelle, de récentes approches ont proposé d'utiliser directement la totalité des informations fournies par l'image. Ces algorithmes, alors qualifiés de directs, se basent pour la plupart sur l'observation des intensités lumineuses de chaque pixel de l'image. Mais ceci a pour effet de limiter le domaine d'utilisation de ces approches, car ce critère de comparaison est très sensibles aux perturbations de la scène (telles que les variations de luminosité ou les occultations). Pour régler ces problèmes nous proposons de nous baser sur des travaux récents qui ont montré que des mesures de similarité comme la somme des variances conditionnelles ou l'information mutuelle permettaient d'accroître la robustesse des approches directes dans des conditions perturbées. Nous proposons alors plusieurs algorithmes de suivi et d'asservissement visuels directs qui utilisent ces fonctions de similarité afin d'estimer le mouvement présents dans des séquences d'images et de contrôler un robot grâce aux informations fournies par une caméra. Ces différentes méthodes sont alors validées et analysées dans différentes conditions qui viennent démontrer leur efficacité.
In this document, we address the visual tracking and visual servoing problems. They are crucial thematics in the domain of computer and robot vision. Most of these techniques use geometrical primitives extracted from the images in order to estimate a motion from an image sequences. But using geometrical features means having to extract and match them at each new image before performing the tracking or servoing process. In order to get rid of this algorithmic step, recent approaches have proposed to use directly the information provided by the whole image instead of extracting geometrical primitives. Most of these algorithms, referred to as direct techniques, are based on the luminance values of every pixel in the image. But this strategy limits their use, since the criteria is very sensitive to scene perturbations such as luminosity shifts or occlusions. To overcome this problem, we propose in this document to use robust similarity measures, the sum of conditional variance and the mutual information, in order to perform robust direct visual tracking and visual servoing processes. Several algorithms are then proposed that are based on these criteria in order to be robust to scene perturbations. These different methods are tested and analyzed in…
Advisors/Committee Members: Marchand, Éric (thesis director).
Subjects/Keywords: Vision par ordinateur; Suivi visuel; Asservissement visuel; Computer science; Computer vision; Visual tracking; Visual servoing
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Delabarre, B. (2014). Contributions to dense visual tracking and visual servoing using robust similarity criteria : Contributions au suivi visuel et à l'asservissement visuel denses basées sur des critères de similarité robustes. (Doctoral Dissertation). Rennes 1. Retrieved from http://www.theses.fr/2014REN1S124
Chicago Manual of Style (16th Edition):
Delabarre, Bertrand. “Contributions to dense visual tracking and visual servoing using robust similarity criteria : Contributions au suivi visuel et à l'asservissement visuel denses basées sur des critères de similarité robustes.” 2014. Doctoral Dissertation, Rennes 1. Accessed March 06, 2021.
http://www.theses.fr/2014REN1S124.
MLA Handbook (7th Edition):
Delabarre, Bertrand. “Contributions to dense visual tracking and visual servoing using robust similarity criteria : Contributions au suivi visuel et à l'asservissement visuel denses basées sur des critères de similarité robustes.” 2014. Web. 06 Mar 2021.
Vancouver:
Delabarre B. Contributions to dense visual tracking and visual servoing using robust similarity criteria : Contributions au suivi visuel et à l'asservissement visuel denses basées sur des critères de similarité robustes. [Internet] [Doctoral dissertation]. Rennes 1; 2014. [cited 2021 Mar 06].
Available from: http://www.theses.fr/2014REN1S124.
Council of Science Editors:
Delabarre B. Contributions to dense visual tracking and visual servoing using robust similarity criteria : Contributions au suivi visuel et à l'asservissement visuel denses basées sur des critères de similarité robustes. [Doctoral Dissertation]. Rennes 1; 2014. Available from: http://www.theses.fr/2014REN1S124

University of Toronto
27.
Liu, Hong Yue Sean.
A General Method for Analyzing Visual Scanning Behaviour in Neuropsychiatric Disorders.
Degree: 2020, University of Toronto
URL: http://hdl.handle.net/1807/103676
► The growing availability of eye-gaze tracking technology has allowed for its employment in a wide variety of applications, one of which is the objective diagnosis…
(more)
▼ The growing availability of eye-gaze tracking technology has allowed for its employment in a wide variety of applications, one of which is the objective diagnosis and monitoring of neuropsychiatric disorders from biases in visual scanning behaviour (VSB). Current techniques in this field are largely comprised of non-generalizable methodologies that rely on domain expertise and study-specific assumptions. This thesis presents a general, data-driven, end-to-end method that extracts relevant features of attention from biases in VSB and uses these features to classify between subject groups with standard machine learning techniques. The general method is compared to methods developed by domain experts to evaluate attentional biases in two psychiatry studies: eating disorders and depression. The results show that the general method can perform just as well as expert-defined techniques, demonstrating its utility as a standard baseline method for analyzing visual scanning data in neuropsychiatric disorders.
M.A.S.
Advisors/Committee Members: Eizenman, Moshe, Electrical and Computer Engineering.
Subjects/Keywords: eye-gaze tracking; machine learning; objective diagnosis; selective attention; visual saliency; visual scanning bias; 0464
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Liu, H. Y. S. (2020). A General Method for Analyzing Visual Scanning Behaviour in Neuropsychiatric Disorders. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/103676
Chicago Manual of Style (16th Edition):
Liu, Hong Yue Sean. “A General Method for Analyzing Visual Scanning Behaviour in Neuropsychiatric Disorders.” 2020. Masters Thesis, University of Toronto. Accessed March 06, 2021.
http://hdl.handle.net/1807/103676.
MLA Handbook (7th Edition):
Liu, Hong Yue Sean. “A General Method for Analyzing Visual Scanning Behaviour in Neuropsychiatric Disorders.” 2020. Web. 06 Mar 2021.
Vancouver:
Liu HYS. A General Method for Analyzing Visual Scanning Behaviour in Neuropsychiatric Disorders. [Internet] [Masters thesis]. University of Toronto; 2020. [cited 2021 Mar 06].
Available from: http://hdl.handle.net/1807/103676.
Council of Science Editors:
Liu HYS. A General Method for Analyzing Visual Scanning Behaviour in Neuropsychiatric Disorders. [Masters Thesis]. University of Toronto; 2020. Available from: http://hdl.handle.net/1807/103676
28.
Karavasilis, Vasileios.
Visual tracking in image sequences using mixture models.
Degree: 2015, University of Ioannina; Πανεπιστήμιο Ιωαννίνων
URL: http://hdl.handle.net/10442/hedi/43023
► This thesis solves the problem of visual tracking in image sequences, which is a computer visions subfield. To solve this problem, mixture models of various…
(more)
▼ This thesis solves the problem of visual tracking in image sequences, which is a computer visions subfield. To solve this problem, mixture models of various distributions have been used in order to model the appearance of the object. The experimental results show that this appearance model improves the execution speed and the robustness of the tracker in cases of illumination change compared to standard modeling approaches, such as histograms.
Η διατριβή ασχολείται με το πρόβλημα της εκτίμησης αντικειμένων της κίνησης σε εικονοσειρές, το οποίο ανήκει στην ευρύτερη περιοχή της υπολογιστικής όρασης. Για την επίλυση του προβλήματος χρησιμοποιήθηκαν μικτά μοντέλα διαφόρων κατανομών για την αναπαράσταση του μοντέλου εμφάνισης του αντικειμένου. Τα πειραματικά αποτελέσματα δείχνουν ότι αυτός ο τρόπος αναπαράστασης έχει καλύτερες επιδόσεις όσον αφορά τον χρόνο εκτέλεσης και την ευστάθεια του αλγορίθμου σε μεταβολές της φωτεινότητας σε σχέση με κλασικές αναπαραστάσεις, όπως είναι τα ιστογράμματα.
Subjects/Keywords: Εικονοσειρές; Εκτίμηση κίνησης; Μικτές κατανομές; Image sequences; Visual tracking; Mixture models
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Karavasilis, V. (2015). Visual tracking in image sequences using mixture models. (Thesis). University of Ioannina; Πανεπιστήμιο Ιωαννίνων. Retrieved from http://hdl.handle.net/10442/hedi/43023
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Karavasilis, Vasileios. “Visual tracking in image sequences using mixture models.” 2015. Thesis, University of Ioannina; Πανεπιστήμιο Ιωαννίνων. Accessed March 06, 2021.
http://hdl.handle.net/10442/hedi/43023.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Karavasilis, Vasileios. “Visual tracking in image sequences using mixture models.” 2015. Web. 06 Mar 2021.
Vancouver:
Karavasilis V. Visual tracking in image sequences using mixture models. [Internet] [Thesis]. University of Ioannina; Πανεπιστήμιο Ιωαννίνων; 2015. [cited 2021 Mar 06].
Available from: http://hdl.handle.net/10442/hedi/43023.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Karavasilis V. Visual tracking in image sequences using mixture models. [Thesis]. University of Ioannina; Πανεπιστήμιο Ιωαννίνων; 2015. Available from: http://hdl.handle.net/10442/hedi/43023
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Clemson University
29.
Edewaard, Darlene.
The Daytime Conspicuity Benefits of Rear-Facing Bike Lights.
Degree: PhD, Human Factors Psychology, 2020, Clemson University
URL: https://tigerprints.clemson.edu/all_dissertations/2682
► Cycling with motor vehicle traffic on roadways is inherently risky, and it is important for bicyclists to make themselves conspicuous to drivers, even during…
(more)
▼ Cycling with motor vehicle traffic on roadways is inherently risky, and it is important for bicyclists to make themselves conspicuous to drivers, even during daylight conditions. Two experiments manipulated rear-facing bike lights to determine how best to help drivers become aware of a bicyclist’s presence during the daytime. Experiment 1 incorporated closed-road methods in which participants provided subjective ratings of conspicuity from a test vehicle parked at two different distances as they viewed 16 configurations of bike lights displayed by a stationary test bicyclist pedaling in daylight. The results indicated that increasing the luminous intensity and number of lights enhanced the relative conspicuity of bicyclists in daylight even as viewing distance increased. Particularly valuable was using ankle-mounted lights that highlighted the pedaling movement of the bicyclist. In Experiment 2, participants wore a head-mounted eye tracker and searched for bicyclists as they were driven along an open-road route that included a test bicyclist displaying one of four light configurations. Participants pressed a button when they detected that a bicyclist might be present in or near the roadway and again when they were confident that a bicyclist was present. The results revealed that after participants first glanced at the bicyclist it took a significant amount of time to detect and then to recognize the bicyclist. Further, lights that were mounted to the seat post of the bike or to the seat post and the heels of the rider’s shoes provided the greatest conspicuity advantage in terms of the distances from which participants recognized the bicyclist. These experiments offer useful insights into the optimal light intensities and placement options for bicyclists to use in order to enhance their conspicuity during the daytime.
Advisors/Committee Members: Richard A Tyrrell, Andrew T Duchowski, Patrick J Rosopa, Benjamin R Stephens.
Subjects/Keywords: Bicyclist Safety; Biological Motion; Conspicuity; Eye Tracking; Transportation Safety; Visual Perception
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APA (6th Edition):
Edewaard, D. (2020). The Daytime Conspicuity Benefits of Rear-Facing Bike Lights. (Doctoral Dissertation). Clemson University. Retrieved from https://tigerprints.clemson.edu/all_dissertations/2682
Chicago Manual of Style (16th Edition):
Edewaard, Darlene. “The Daytime Conspicuity Benefits of Rear-Facing Bike Lights.” 2020. Doctoral Dissertation, Clemson University. Accessed March 06, 2021.
https://tigerprints.clemson.edu/all_dissertations/2682.
MLA Handbook (7th Edition):
Edewaard, Darlene. “The Daytime Conspicuity Benefits of Rear-Facing Bike Lights.” 2020. Web. 06 Mar 2021.
Vancouver:
Edewaard D. The Daytime Conspicuity Benefits of Rear-Facing Bike Lights. [Internet] [Doctoral dissertation]. Clemson University; 2020. [cited 2021 Mar 06].
Available from: https://tigerprints.clemson.edu/all_dissertations/2682.
Council of Science Editors:
Edewaard D. The Daytime Conspicuity Benefits of Rear-Facing Bike Lights. [Doctoral Dissertation]. Clemson University; 2020. Available from: https://tigerprints.clemson.edu/all_dissertations/2682

University of Edinburgh
30.
Pajak, Maciej.
Do we look at objects in the same way as we read words?.
Degree: 2012, University of Edinburgh
URL: http://hdl.handle.net/1842/8386
► While saccade targeting in text reading is thought to be word based, in scene viewing research there is an ongoing debate between saliency-based targeting and…
(more)
▼ While saccade targeting in text reading is thought to be word based, in scene viewing research there is an ongoing debate between saliency-based targeting and object-based targeting. Robust Preferred Viewing Location (PVL) effect for words and significant influence of factors such as word length and launch site distance constitute a strong argument in favour of the word-based saccade targeting hypothesis in reading. Also, related effects – the refixation Optimal Viewing Position (OVP) and the fixation duration Inverted Optimal Viewing Position (IOVP) for words have been confirmed in reading studies. Following recent results reporting PVL for objects in scene viewing, the current study further investigated the phenomenon using a corpus of eye
tracking data collected from 72 participants looking at the 135 naturalistic scenes with 730 tagged objects in aesthetic judgement and memorisation tasks. The PVL for objects was found to be influenced by both object size, and object centre based launch site distance, in the same direction as hypothesised based on the reading literature, i.e. large size of the object and long launch site distance shifted the distribution towards the object edge closest to the launch site. Although there was no evidence for refixation OVP effect, fixation duration IOVP was found for both first and single fixations. These findings contribute to the existing evidence in favour of object-based saccade targeting and point to the parallel between the way we move our eyes in reading and in scene viewing.
Advisors/Committee Members: Nuthmann, Antje.
Subjects/Keywords: visual attention; eye movements; eye tracking; scene viewing
Record Details
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Record Details
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Pajak, M. (2012). Do we look at objects in the same way as we read words?. (Thesis). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/8386
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Pajak, Maciej. “Do we look at objects in the same way as we read words?.” 2012. Thesis, University of Edinburgh. Accessed March 06, 2021.
http://hdl.handle.net/1842/8386.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Pajak, Maciej. “Do we look at objects in the same way as we read words?.” 2012. Web. 06 Mar 2021.
Vancouver:
Pajak M. Do we look at objects in the same way as we read words?. [Internet] [Thesis]. University of Edinburgh; 2012. [cited 2021 Mar 06].
Available from: http://hdl.handle.net/1842/8386.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Pajak M. Do we look at objects in the same way as we read words?. [Thesis]. University of Edinburgh; 2012. Available from: http://hdl.handle.net/1842/8386
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
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