You searched for subject:(stereovision).
Showing records 1 – 30 of
63 total matches.
◁ [1] [2] [3] ▶
University of Texas – Austin
1.
Yao, Ming, Ph. D.
Fabric wrinkling and pilling evaluation by stereovision and three-dimensional surface characterization.
Degree: MSin Textile and Apparel Technology, Textile and Apparel Technology, 2011, University of Texas – Austin
URL: http://hdl.handle.net/2152/ETD-UT-2011-12-4750 
► Wrinkling and pilling caused in wear and care procedures are vital performance characteristics of fabric. The advance of three-dimensional (3D) imaging techniques has made it…
(more)
▼ Wrinkling and pilling caused in wear and care procedures are vital performance characteristics of fabric. The advance of three-dimensional (3D) imaging techniques has made it possible to develop a convenient, reliable and low cost tool for automatic and efficient evaluation of fabric wrinkling and pilling. We suggest that 3D imaging and measurement system can provide a convenient, accommodating and comprehensive mean to fabric surface assessment.
A 3D imaging system based on stereo vision technology is developed. To make it more affordable and portable, the system consists of a pair of consumer grade high resolution digital cameras with mounting hardware. The system is calibrated with classic camera calibration technique. The calibration procedure is relatively complicated, but there is no need to repeat frequently as long as the relative positions between cameras are not changed. In this system, image acquisition can be completed in less than one second. This efficient surface capturing feature is important for a large amount of measurement tasks.
However, the computation in stereo vision is complex and intensive, thus it remains a challenge. A two-phase multi-resolution stereo matching algorithm is developed. In the first phase, a discrete disparity map is generated by block matching. In the second phase, local least-squares matching is performed in combination with global optimization within a regularization framework, so as to ensure both accuracy and reliability.
To make the 3D imaging system ready for practical use, detection and measurement modules for wrinkling and pilling were developed to take advantage of the depth information in the 3D surface data. The practical feasibility of the 3D imaging system in fabric surface assessment was demonstrated in comparison with human visual ratings. The results showed agreement between the 3D automatic assessment and subjective visual assessment.
Advisors/Committee Members: Xu, Bugao (advisor), Chen, Jonathan Y. (committee member).
Subjects/Keywords: Stereovision; Wrinkling; Pilling
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yao, Ming, P. D. (2011). Fabric wrinkling and pilling evaluation by stereovision and three-dimensional surface characterization. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/ETD-UT-2011-12-4750
Chicago Manual of Style (16th Edition):
Yao, Ming, Ph D. “Fabric wrinkling and pilling evaluation by stereovision and three-dimensional surface characterization.” 2011. Masters Thesis, University of Texas – Austin. Accessed January 18, 2021.
http://hdl.handle.net/2152/ETD-UT-2011-12-4750.
MLA Handbook (7th Edition):
Yao, Ming, Ph D. “Fabric wrinkling and pilling evaluation by stereovision and three-dimensional surface characterization.” 2011. Web. 18 Jan 2021.
Vancouver:
Yao, Ming PD. Fabric wrinkling and pilling evaluation by stereovision and three-dimensional surface characterization. [Internet] [Masters thesis]. University of Texas – Austin; 2011. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/2152/ETD-UT-2011-12-4750.
Council of Science Editors:
Yao, Ming PD. Fabric wrinkling and pilling evaluation by stereovision and three-dimensional surface characterization. [Masters Thesis]. University of Texas – Austin; 2011. Available from: http://hdl.handle.net/2152/ETD-UT-2011-12-4750
University of Cambridge
2.
Schaeffner, Lukas Fabian.
Brain stimulation reveals neural mechanisms of stereopsis.
Degree: PhD, 2019, University of Cambridge
URL: https://www.repository.cam.ac.uk/handle/1810/291804
► Stereopsis is critical for interaction with our environment. However, binocular disparity in natural images is often ambiguous and this makes it difficult to establish a…
(more)
▼ Stereopsis is critical for interaction with our environment. However, binocular disparity in natural images is often ambiguous and this makes it difficult to establish a binocular correspondence solution. In my thesis, I focus on both the challenges of this problem and solutions that the brain applies. To study brain function, I use Transcranial Magnetic Stimulation (TMS) which allows me to causally relate induced changes in neural activity with changes in depth perception. This way I can map out neural mechanisms of stereopsis within the visual cortex.
As a first step, I conducted a proof of concept study to confirm where in the visual cortex TMS can be used to study perception. I systematically mapped out where in the visual cortex TMS triggers self-propagating, perceptually noticeable neural activation. I related this to the retinotopic organisation and the location of object- and motion-selective areas, identified by functional Magnetic Resonance Imaging. My work confirms that TMS can trigger perceptually significant neural activation in early and dorsal visual areas.
In my second chapter, I investigated how incoherent binocular disparity challenges stereopsis. As disparity coherence is reduced it becomes increasingly challenging to establish global correspondence and consequently observers struggle to perceive depth. Interestingly, this problem is less severe when images contain a mixture of bright and dark features (mixed contrast polarity). By locating where in the brain disparity processing benefits from mixed contrast polarity, I can infer where incoherent disparity might challenge mechanisms of stereopsis. I applied TMS during discrimination of incoherent disparity in images with mixed or single contrast polarity. I found that stimulation over V1 differentially affects perception of mixed and single polarity stimuli. My findings show that mechanisms of stereopsis in early visual cortex process mixed and single polarity differently and suggest these mechanisms are challenged by incoherent disparity.
In my final chapter, I investigated the role of parietal cortex in the processing of incoherent disparity information. Findings in both macaque monkeys and human observers suggest that the dorsal visual cortex is particularly involved in the processing of incoherent disparity signals. Here, I tested the role of the posterior parietal cortex in human observers. I used brain stimulation to suppress synaptic transmission in parietal cortex and recorded electroencephalography during incoherent disparity processing. Disrupting parietal cortex caused changes in early, disparity responses in visual cortex. This suggests that parietal cortex provides top-down influence to the visual cortex relevant to incoherent disparity processing.
Subjects/Keywords: Stereovision; Brain stimulation; Binocular disparity
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Schaeffner, L. F. (2019). Brain stimulation reveals neural mechanisms of stereopsis. (Doctoral Dissertation). University of Cambridge. Retrieved from https://www.repository.cam.ac.uk/handle/1810/291804
Chicago Manual of Style (16th Edition):
Schaeffner, Lukas Fabian. “Brain stimulation reveals neural mechanisms of stereopsis.” 2019. Doctoral Dissertation, University of Cambridge. Accessed January 18, 2021.
https://www.repository.cam.ac.uk/handle/1810/291804.
MLA Handbook (7th Edition):
Schaeffner, Lukas Fabian. “Brain stimulation reveals neural mechanisms of stereopsis.” 2019. Web. 18 Jan 2021.
Vancouver:
Schaeffner LF. Brain stimulation reveals neural mechanisms of stereopsis. [Internet] [Doctoral dissertation]. University of Cambridge; 2019. [cited 2021 Jan 18].
Available from: https://www.repository.cam.ac.uk/handle/1810/291804.
Council of Science Editors:
Schaeffner LF. Brain stimulation reveals neural mechanisms of stereopsis. [Doctoral Dissertation]. University of Cambridge; 2019. Available from: https://www.repository.cam.ac.uk/handle/1810/291804
Delft University of Technology
3.
Nayar, Gokul (author).
High Accuracy Eye Tracking for Proton Therapy.
Degree: 2017, Delft University of Technology
URL: http://resolver.tudelft.nl/uuid:249e710d-02db-421f-afc7-b1a84af883ec
► Accurate and safe proton beam delivery is one of the most crucial tasks during Proton Therapy (PT) of ocular melanoma. The eye movement and gaze…
(more)
▼ Accurate and safe proton beam delivery is one of the most crucial tasks during Proton Therapy (PT) of ocular melanoma. The eye movement and gaze angle tracking system should be able to monitor in real time the eye position and orientation (6 degree of freedom) to exactly localize the tumor location inside the eye with respect to the proton beam. The system should also immediately switch the beam off if the tumor goes out of the irradiated area to protect vital organs and keep the non affected cells healthy. The non-invasive eye-tracking system will replace the painful surgical procedure of implantation of radio-opaque tantalum clips on the eye. In order to estimate accurately enough the eye gaze angle and torsion, a stereo imaging system consisting of two high-resolution imaging cameras and two infra-red beacons can be used. The six coordinates of the eye are extracted by image analysis of the acquired stereo camera images using the beacons reflections (glints) and location of the eye pupil. The accuracy of the method can be affected by motion artifacts and difficulty of pupil segmentation in some eyes. Further, the method is inclusive to cyclo-torsion (rotation of the eye about its optical axis). The eye-tracking system can thus benefit from motion artifacts suppression and implementation of analysis of the eye surface features, e.g. iris pattern. Another addition is to use steerable mounts and mirrors to improve measurements and, thus, eye tracking accuracy. The goal of this thesis is to build a prototype stereo eye-tracking system, write a tracking code and investigate the viability of this method for further improving eye tracking accuracy.
Advisors/Committee Members: Verhaegen, Michel (mentor), Soloviev, Oleg (graduation committee), Giordano, Giulia (graduation committee), Delft University of Technology (degree granting institution).
Subjects/Keywords: Eye Tracking; StereoVision; prototype
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nayar, G. (. (2017). High Accuracy Eye Tracking for Proton Therapy. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:249e710d-02db-421f-afc7-b1a84af883ec
Chicago Manual of Style (16th Edition):
Nayar, Gokul (author). “High Accuracy Eye Tracking for Proton Therapy.” 2017. Masters Thesis, Delft University of Technology. Accessed January 18, 2021.
http://resolver.tudelft.nl/uuid:249e710d-02db-421f-afc7-b1a84af883ec.
MLA Handbook (7th Edition):
Nayar, Gokul (author). “High Accuracy Eye Tracking for Proton Therapy.” 2017. Web. 18 Jan 2021.
Vancouver:
Nayar G(. High Accuracy Eye Tracking for Proton Therapy. [Internet] [Masters thesis]. Delft University of Technology; 2017. [cited 2021 Jan 18].
Available from: http://resolver.tudelft.nl/uuid:249e710d-02db-421f-afc7-b1a84af883ec.
Council of Science Editors:
Nayar G(. High Accuracy Eye Tracking for Proton Therapy. [Masters Thesis]. Delft University of Technology; 2017. Available from: http://resolver.tudelft.nl/uuid:249e710d-02db-421f-afc7-b1a84af883ec
University of Cambridge
4.
Schaeffner, Lukas Fabian.
Brain stimulation reveals neural mechanisms of stereopsis.
Degree: PhD, 2019, University of Cambridge
URL: https://doi.org/10.17863/CAM.38964
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.774729
► Stereopsis is critical for interaction with our environment. However, binocular disparity in natural images is often ambiguous and this makes it difficult to establish a…
(more)
▼ Stereopsis is critical for interaction with our environment. However, binocular disparity in natural images is often ambiguous and this makes it difficult to establish a binocular correspondence solution. In my thesis, I focus on both the challenges of this problem and solutions that the brain applies. To study brain function, I use Transcranial Magnetic Stimulation (TMS) which allows me to causally relate induced changes in neural activity with changes in depth perception. This way I can map out neural mechanisms of stereopsis within the visual cortex. As a first step, I conducted a proof of concept study to confirm where in the visual cortex TMS can be used to study perception. I systematically mapped out where in the visual cortex TMS triggers self-propagating, perceptually noticeable neural activation. I related this to the retinotopic organisation and the location of object- and motion-selective areas, identified by functional Magnetic Resonance Imaging. My work confirms that TMS can trigger perceptually significant neural activation in early and dorsal visual areas. In my second chapter, I investigated how incoherent binocular disparity challenges stereopsis. As disparity coherence is reduced it becomes increasingly challenging to establish global correspondence and consequently observers struggle to perceive depth. Interestingly, this problem is less severe when images contain a mixture of bright and dark features (mixed contrast polarity). By locating where in the brain disparity processing benefits from mixed contrast polarity, I can infer where incoherent disparity might challenge mechanisms of stereopsis. I applied TMS during discrimination of incoherent disparity in images with mixed or single contrast polarity. I found that stimulation over V1 differentially affects perception of mixed and single polarity stimuli. My findings show that mechanisms of stereopsis in early visual cortex process mixed and single polarity differently and suggest these mechanisms are challenged by incoherent disparity. In my final chapter, I investigated the role of parietal cortex in the processing of incoherent disparity information. Findings in both macaque monkeys and human observers suggest that the dorsal visual cortex is particularly involved in the processing of incoherent disparity signals. Here, I tested the role of the posterior parietal cortex in human observers. I used brain stimulation to suppress synaptic transmission in parietal cortex and recorded electroencephalography during incoherent disparity processing. Disrupting parietal cortex caused changes in early, disparity responses in visual cortex. This suggests that parietal cortex provides top-down influence to the visual cortex relevant to incoherent disparity processing.
Subjects/Keywords: Stereovision; Brain stimulation; Binocular disparity
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Schaeffner, L. F. (2019). Brain stimulation reveals neural mechanisms of stereopsis. (Doctoral Dissertation). University of Cambridge. Retrieved from https://doi.org/10.17863/CAM.38964 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.774729
Chicago Manual of Style (16th Edition):
Schaeffner, Lukas Fabian. “Brain stimulation reveals neural mechanisms of stereopsis.” 2019. Doctoral Dissertation, University of Cambridge. Accessed January 18, 2021.
https://doi.org/10.17863/CAM.38964 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.774729.
MLA Handbook (7th Edition):
Schaeffner, Lukas Fabian. “Brain stimulation reveals neural mechanisms of stereopsis.” 2019. Web. 18 Jan 2021.
Vancouver:
Schaeffner LF. Brain stimulation reveals neural mechanisms of stereopsis. [Internet] [Doctoral dissertation]. University of Cambridge; 2019. [cited 2021 Jan 18].
Available from: https://doi.org/10.17863/CAM.38964 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.774729.
Council of Science Editors:
Schaeffner LF. Brain stimulation reveals neural mechanisms of stereopsis. [Doctoral Dissertation]. University of Cambridge; 2019. Available from: https://doi.org/10.17863/CAM.38964 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.774729
Virginia Tech
5.
Chadha, Abhimanyu.
Vision Based Localization of Drones in a GPS Denied Environment.
Degree: MS, Computer Engineering, 2020, Virginia Tech
URL: http://hdl.handle.net/10919/99887
► In the recent years, technologies like Deep Learning and Machine Learning have seen many rapid developments. This has lead to the rise of fields such…
(more)
▼ In the recent years, technologies like Deep Learning and Machine Learning have seen many
rapid developments. This has lead to the rise of fields such as autonomous drones and
their application in fields such as bridge inspection, search and rescue operations, disaster
management relief, agriculture, real estate etc. Since GPS is a highly unreliable sensor, we
need an alternate method to be able to localize the drones in various environments in real
time. In this thesis, we integrate a robust drone detection neural network with a camera
which estimates the location. We then use this data to get the relative location of all
the follower drones from the leader drone. We run experiments with the camera and in a
simulator to show the accuracy of our results.
Advisors/Committee Members: Williams, Ryan K. (committeechair), Abbott, Amos L. (committee member), Huang, Jia-Bin (committee member).
Subjects/Keywords: Autonomous UAVs; Stereovision; Localization
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chadha, A. (2020). Vision Based Localization of Drones in a GPS Denied Environment. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/99887
Chicago Manual of Style (16th Edition):
Chadha, Abhimanyu. “Vision Based Localization of Drones in a GPS Denied Environment.” 2020. Masters Thesis, Virginia Tech. Accessed January 18, 2021.
http://hdl.handle.net/10919/99887.
MLA Handbook (7th Edition):
Chadha, Abhimanyu. “Vision Based Localization of Drones in a GPS Denied Environment.” 2020. Web. 18 Jan 2021.
Vancouver:
Chadha A. Vision Based Localization of Drones in a GPS Denied Environment. [Internet] [Masters thesis]. Virginia Tech; 2020. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/10919/99887.
Council of Science Editors:
Chadha A. Vision Based Localization of Drones in a GPS Denied Environment. [Masters Thesis]. Virginia Tech; 2020. Available from: http://hdl.handle.net/10919/99887
University of Texas – Austin
6.
Lee, Jane Jaeyon.
Assessment of body composition : total, central, and regional adiposity via stereovision body imaging.
Degree: PhD, Nutritional Sciences, 2014, University of Texas – Austin
URL: http://hdl.handle.net/2152/31564
► This research utilized stereovision body imaging (SBI) as a method for determining total, central and regional body composition. In Aim 1, prediction equations for abdominal…
(more)
▼ This research utilized
stereovision body imaging (SBI) as a method for determining total, central and regional body composition. In Aim 1, prediction equations for abdominal adiposity were developed via anthropometrics, SBI, and magnetic resonance imaging. R2 for total abdominal, subcutaneous, and visceral adiposity were 89.9%, 90.4% and 71.7%, respectively. The prediction of visceral fat was improved when SBI was included as a method. In Aim 2, body size and shape of men and women, as well as risks associated with accumulation of visceral adiposity, were determined by body measurements via SBI. Men had higher total body, torso and abdomen-hip volumes and waist circumference, while women exhibited greater thigh volume, hip circumference, and lower body-volume ratios (p<0.05), while the BMI values for men and women did not differ (p>0.05). Thigh to torso [odds ratios (OR) 0.44] and abdomen-hip (OR 0.41) volume ratios were associated with decreased risks of accumulating visceral adiposity. SBI was effective for determination of body size and shape and the prediction of visceral adiposity accumulation in adults. In Aim 3, the efficacy of body measurements assessed by SBI was explored for the determination of android and gynoid body fat via SBI and dual-energy x-ray absorptiometry. The R2 of the mathematical equations established by body measurements assessed via SBI for fat mass and percent body fat were 93.2% and 76.4% for android, and 91.4% and 66.5% for gynoid, respectively. These prediction values indicate that SBI is good for estimation of android and gynoid body fat mass; but less effective for percent body fat. An improved understanding of human body composition was achieved by this research.
Advisors/Committee Members: Freeland-Graves, Jeanne H. (advisor), Xu, Bugao (committee member), Jolly, Christopher (committee member), Finnell, Richard (committee member), Tanaka, Hirofumi (committee member).
Subjects/Keywords: Body composition; Stereovision body imaging
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lee, J. J. (2014). Assessment of body composition : total, central, and regional adiposity via stereovision body imaging. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/31564
Chicago Manual of Style (16th Edition):
Lee, Jane Jaeyon. “Assessment of body composition : total, central, and regional adiposity via stereovision body imaging.” 2014. Doctoral Dissertation, University of Texas – Austin. Accessed January 18, 2021.
http://hdl.handle.net/2152/31564.
MLA Handbook (7th Edition):
Lee, Jane Jaeyon. “Assessment of body composition : total, central, and regional adiposity via stereovision body imaging.” 2014. Web. 18 Jan 2021.
Vancouver:
Lee JJ. Assessment of body composition : total, central, and regional adiposity via stereovision body imaging. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2014. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/2152/31564.
Council of Science Editors:
Lee JJ. Assessment of body composition : total, central, and regional adiposity via stereovision body imaging. [Doctoral Dissertation]. University of Texas – Austin; 2014. Available from: http://hdl.handle.net/2152/31564
7.
Yao, Yuanbin.
GPU Based Real-Time Trinocular Stereovision.
Degree: MS, 2012, Worcester Polytechnic Institute
URL: etd-082412-130232
;
https://digitalcommons.wpi.edu/etd-theses/971
► "Stereovision has been applied in many fields including UGV (Unmanned Ground Vehicle) navigation and surgical robotics. Traditionally most stereovision applications are binocular which uses information…
(more)
▼ "
Stereovision has been applied in many fields including UGV (Unmanned Ground Vehicle) navigation and surgical robotics. Traditionally most
stereovision applications are binocular which uses information from a horizontal 2-camera array to perform stereo matching and compute the depth image. Trinocular
stereovision with a 3-camera array has been proved to provide higher accuracy in stereo matching which could benefit application like distance finding, object recognition and detection. However, as a result of an extra camera, additional information to be processed would increase computational burden and hence not practical in many time critical applications like robotic navigation and surgical robot. Due to the nature of GPUÂ’s highly parallelized SIMD (Single Instruction Multiple Data) architecture, GPGPU (General Purpose GPU) computing can effectively be used to parallelize the large data processing and greatly accelerate the computation of algorithms used in trinocular
stereovision. So the combination of trinocular
stereovision and GPGPU would be an innovative and effective method for the development of
stereovision application. This work focuses on designing and implementing a real-time trinocular
stereovision algorithm with GPU (Graphics Processing Unit). The goal involves the use of Open Source Computer Vision Library (OpenCV) in C++ and NVidia CUDA GPGPU Solution. Algorithms were developed with many different basic image processing methods and a winner-take-all method is applied to perform fusion of disparities in different directions. The results are compared in accuracy and speed to verify the improvement."
Advisors/Committee Members: Taskin Padir, Advisor, Xinming Huang, Committee Member, Michael A. Gennert, Committee Member.
Subjects/Keywords: OpenCV; Computer Vision; Trinocular; Stereovision; GPGPU; CUDA
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yao, Y. (2012). GPU Based Real-Time Trinocular Stereovision. (Thesis). Worcester Polytechnic Institute. Retrieved from etd-082412-130232 ; https://digitalcommons.wpi.edu/etd-theses/971
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):
Yao, Yuanbin. “GPU Based Real-Time Trinocular Stereovision.” 2012. Thesis, Worcester Polytechnic Institute. Accessed January 18, 2021.
etd-082412-130232 ; https://digitalcommons.wpi.edu/etd-theses/971.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yao, Yuanbin. “GPU Based Real-Time Trinocular Stereovision.” 2012. Web. 18 Jan 2021.
Vancouver:
Yao Y. GPU Based Real-Time Trinocular Stereovision. [Internet] [Thesis]. Worcester Polytechnic Institute; 2012. [cited 2021 Jan 18].
Available from: etd-082412-130232 ; https://digitalcommons.wpi.edu/etd-theses/971.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yao Y. GPU Based Real-Time Trinocular Stereovision. [Thesis]. Worcester Polytechnic Institute; 2012. Available from: etd-082412-130232 ; https://digitalcommons.wpi.edu/etd-theses/971
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
8.
Fernandez Julia, Laura.
Avancements dans l'estimation de pose et la reconstruction 3D de scènes à 2 et 3 vues : Advances on Pose Estimation and 3D Resconstruction of 2 and 3-View Scenes.
Degree: Docteur es, Signal, Image, Automatique, 2018, Université Paris-Est
URL: http://www.theses.fr/2018PESC1157
► L'étude des caméras et des images a été un sujet prédominant depuis le début de la vision par ordinateur, l'un des principaux axes étant l'estimation…
(more)
▼ L'étude des caméras et des images a été un sujet prédominant depuis le début de la vision par ordinateur, l'un des principaux axes étant l'estimation de la pose et la reconstruction 3D. Le but de cette thèse est d'aborder et d'étudier certains problèmes et méthodes spécifiques du pipeline de la structure-from-motion afin d'améliorer la précision, de réaliser de vastes études pour comprendre les avantages et les inconvénients des modèles existants et de créer des outils mis à la disposition du public. Plus spécifiquement, nous concentrons notre attention sur les pairs stéréoscopiques et les triplets d'images et nous explorons certaines des méthodes et modèles capables de fournir une estimation de la pose et une reconstruction 3D de la scène.Tout d'abord, nous abordons la tâche d'estimation de la profondeur pour les pairs stéréoscopiques à l'aide de la correspondance de blocs. Cette approche suppose implicitement que tous les pixels du patch ont la même profondeur, ce qui produit l'artefact commun dénommé "foreground-fattening effect". Afin de trouver un support plus approprié, Yoon et Kweon ont introduit l'utilisation de poids basés sur la similarité des couleurs et la distance spatiale, analogues à ceux utilisés dans le filtre bilatéral. Nous présentons la théorie de cette méthode et l'implémentation que nous avons développée avec quelques améliorations. Nous discutons de quelques variantes de la méthode et analysons ses paramètres et ses performances.Deuxièmement, nous considérons l'ajout d'une troisième vue et étudions le tenseur trifocal, qui décrit les contraintes géométriques reliant les trois vues. Nous explorons les avantages offerts par cet opérateur dans la tâche d'estimation de pose d'un triplet de caméras par opposition au calcul des poses relatives paire par paire en utilisant la matrice fondamentale. De plus, nous présentons une étude et l’implémentation de plusieurs paramétrisations du tenseur. Nous montrons que l'amélioration initiale de la précision du tenseur trifocal n'est pas suffisante pour avoir un impact remarquable sur l'estimation de la pose après ajustement de faisceau et que l'utilisation de la matrice fondamentale avec des triplets d'image reste pertinente.Enfin, nous proposons d'utiliser un modèle de projection différent de celui de la caméra à sténopé pour l'estimation de la pose des caméras en perspective. Nous présentons une méthode basée sur la factorisation matricielle due à Tomasi et Kanade qui repose sur la projection orthographique. Cette méthode peut être utilisée dans des configurations où d'autres méthodes échouent, en particulier lorsque l'on utilise des caméras avec des objectifs à longue distance focale. La performance de notre implémentation de cette méthode est comparée à celle des méthodes basées sur la perspective, nous considérons que l'exactitude obtenue et la robustesse démontré en font un élément à considérer dans toute procédure de la SfM
The study of cameras and images has been a prominent subject since the beginning of computer vision, one of the main focus…
Advisors/Committee Members: Monasse, Pascal (thesis director), Pierrot-Deseilligny, Marc (thesis director).
Subjects/Keywords: Tenseur trifocal; Reconstruction 3D; Projection orthographique; Stereovision; Estimation de pose; Stereovision; Pose estimation; Orthographic projection; 3D reconstruction; Trifocal tensor
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Fernandez Julia, L. (2018). Avancements dans l'estimation de pose et la reconstruction 3D de scènes à 2 et 3 vues : Advances on Pose Estimation and 3D Resconstruction of 2 and 3-View Scenes. (Doctoral Dissertation). Université Paris-Est. Retrieved from http://www.theses.fr/2018PESC1157
Chicago Manual of Style (16th Edition):
Fernandez Julia, Laura. “Avancements dans l'estimation de pose et la reconstruction 3D de scènes à 2 et 3 vues : Advances on Pose Estimation and 3D Resconstruction of 2 and 3-View Scenes.” 2018. Doctoral Dissertation, Université Paris-Est. Accessed January 18, 2021.
http://www.theses.fr/2018PESC1157.
MLA Handbook (7th Edition):
Fernandez Julia, Laura. “Avancements dans l'estimation de pose et la reconstruction 3D de scènes à 2 et 3 vues : Advances on Pose Estimation and 3D Resconstruction of 2 and 3-View Scenes.” 2018. Web. 18 Jan 2021.
Vancouver:
Fernandez Julia L. Avancements dans l'estimation de pose et la reconstruction 3D de scènes à 2 et 3 vues : Advances on Pose Estimation and 3D Resconstruction of 2 and 3-View Scenes. [Internet] [Doctoral dissertation]. Université Paris-Est; 2018. [cited 2021 Jan 18].
Available from: http://www.theses.fr/2018PESC1157.
Council of Science Editors:
Fernandez Julia L. Avancements dans l'estimation de pose et la reconstruction 3D de scènes à 2 et 3 vues : Advances on Pose Estimation and 3D Resconstruction of 2 and 3-View Scenes. [Doctoral Dissertation]. Université Paris-Est; 2018. Available from: http://www.theses.fr/2018PESC1157
University of California – San Diego
9.
Salzer, Rebecca.
Questions for Pedagogical and Creative Discovery.
Degree: Theatre, 2011, University of California – San Diego
URL: http://www.escholarship.org/uc/item/63m1z5sc
► Being part of this graduate program has given me not only new knowledge, but a host of creative and scholarly questions. Many of these questions…
(more)
▼ Being part of this graduate program has given me not only new knowledge, but a host of creative and scholarly questions. Many of these questions revolve around finding authenticity and immediacy in performance and how digital media adds or detracts from this process. This thesis outlines some pedagogical, scholarly, and creative avenues for exploring these questions, as well as some possible directions for my continued creative research.
Subjects/Keywords: Dance; Theater; Performing Arts; dance; improvisation; screendance; stereovision; theatre
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Salzer, R. (2011). Questions for Pedagogical and Creative Discovery. (Thesis). University of California – San Diego. Retrieved from http://www.escholarship.org/uc/item/63m1z5sc
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):
Salzer, Rebecca. “Questions for Pedagogical and Creative Discovery.” 2011. Thesis, University of California – San Diego. Accessed January 18, 2021.
http://www.escholarship.org/uc/item/63m1z5sc.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Salzer, Rebecca. “Questions for Pedagogical and Creative Discovery.” 2011. Web. 18 Jan 2021.
Vancouver:
Salzer R. Questions for Pedagogical and Creative Discovery. [Internet] [Thesis]. University of California – San Diego; 2011. [cited 2021 Jan 18].
Available from: http://www.escholarship.org/uc/item/63m1z5sc.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Salzer R. Questions for Pedagogical and Creative Discovery. [Thesis]. University of California – San Diego; 2011. Available from: http://www.escholarship.org/uc/item/63m1z5sc
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Brno University of Technology
10.
Musálek, Martin.
Tvorba 3D modelů: 3D reconstruction.
Degree: 2019, Brno University of Technology
URL: http://hdl.handle.net/11012/31339
► Thesis solves 3D reconstruction of an object by method of lighting by pattern. A projector lights the measured object by defined pattern and two cameras…
(more)
▼ Thesis solves 3D reconstruction of an object by method of lighting by pattern. A projector lights the measured object by defined pattern and two cameras are measuring 2D points from it. The pedestal of obejct rotates and during the measure are acquired data from different angles. Points are indentified from measured images, transformed to 3D using
stereovision, connected to 3D model and displayed.
Advisors/Committee Members: Richter, Miloslav (advisor), Horák, Karel (referee).
Subjects/Keywords: 3D rekonstrukce; stereovidění; počítačové vidění; 3D reconstruction; stereovision; computer vision
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Musálek, M. (2019). Tvorba 3D modelů: 3D reconstruction. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/31339
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):
Musálek, Martin. “Tvorba 3D modelů: 3D reconstruction.” 2019. Thesis, Brno University of Technology. Accessed January 18, 2021.
http://hdl.handle.net/11012/31339.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Musálek, Martin. “Tvorba 3D modelů: 3D reconstruction.” 2019. Web. 18 Jan 2021.
Vancouver:
Musálek M. Tvorba 3D modelů: 3D reconstruction. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/11012/31339.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Musálek M. Tvorba 3D modelů: 3D reconstruction. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/31339
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Queens University
11.
Morton, Amy.
Validation of 3D Surface Measurements Using Computed Tomography
.
Degree: Computing, 2012, Queens University
URL: http://hdl.handle.net/1974/6948
► Objective and accurate surface measurements are important in many clinical disciplines. Non-irradiating and low cost alternatives are available but validation of these measurement tools for…
(more)
▼ Objective and accurate surface measurements are important in many clinical disciplines. Non-irradiating and low cost alternatives are available but validation of these measurement tools for clinical application is variable and sparse. This thesis presents a three dimensional (3D) surface measurement method validated by gold standard Computed Tomography (CT). Forty-one 3D surface data sets were acquired by two modalities, a laser scanner and a binocular camera. The binocular camera was tested with three different texture modifiers that increased the colour variability of the imaged surface. A surface area calculation algorithm was created to process the data sets. Relative differences were calculated for each area measurement with respect to its corresponding CT measurement. The laser scanner data sets were affected by movement and specular reflection artefacts. The measurements were statistically equivalent to CT if less than 20% error were considered acceptable. The binocular camera with the slide projected texture modifier was shown to be statistically equivalent to CT gold standard with less than 5% error (p < 0.0005). The surface area measurement method can easily be expanded and customized. By following the protocol outlined by the example in this work, researchers and clinicians would also be able to objectively asses other vision systems' performance and suitability.
Subjects/Keywords: 3D Surface Contours
;
Computed Tomography
;
Stereovision
;
Laser Scanner
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Morton, A. (2012). Validation of 3D Surface Measurements Using Computed Tomography
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/6948
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):
Morton, Amy. “Validation of 3D Surface Measurements Using Computed Tomography
.” 2012. Thesis, Queens University. Accessed January 18, 2021.
http://hdl.handle.net/1974/6948.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Morton, Amy. “Validation of 3D Surface Measurements Using Computed Tomography
.” 2012. Web. 18 Jan 2021.
Vancouver:
Morton A. Validation of 3D Surface Measurements Using Computed Tomography
. [Internet] [Thesis]. Queens University; 2012. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/1974/6948.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Morton A. Validation of 3D Surface Measurements Using Computed Tomography
. [Thesis]. Queens University; 2012. Available from: http://hdl.handle.net/1974/6948
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
12.
Nair, Ashish.
Panoramic Stereovision and Scene Reconstruction.
Degree: MS, Computer Engineering, 2016, Santa Clara University
URL: https://scholarcommons.scu.edu/cseng_mstr/2
► With advancement of research in robotics and computer vision, an increasingly high number of applications require the understanding of a scene in three dimensions.…
(more)
▼ With advancement of research in robotics and computer vision, an increasingly high number of applications require the understanding of a scene in three dimensions. A variety of systems are deployed to do the same. This thesis explores a novel 3D imaging technique. This involves the use of catadioptric cameras in a stereoscopic arrangement. A secondary system aims to stabilize the system in the event that the cameras are misaligned during operation. The system provides a stark advantage due to it being a cost effective alternative to present day standard state-of-the-art systems that achieve the same goal of 3D imaging. The compromise lies in the quality of depth estimation, which can be overcome with a different imager and calibration. The result was a panoramic disparity map generated by the system.
Advisors/Committee Members: Nam Ling.
Subjects/Keywords: Stereovision; SURF; RANSAC; 3D Imaging; Rectification; Stereo Correspondence; Computer Engineering
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nair, A. (2016). Panoramic Stereovision and Scene Reconstruction. (Masters Thesis). Santa Clara University. Retrieved from https://scholarcommons.scu.edu/cseng_mstr/2
Chicago Manual of Style (16th Edition):
Nair, Ashish. “Panoramic Stereovision and Scene Reconstruction.” 2016. Masters Thesis, Santa Clara University. Accessed January 18, 2021.
https://scholarcommons.scu.edu/cseng_mstr/2.
MLA Handbook (7th Edition):
Nair, Ashish. “Panoramic Stereovision and Scene Reconstruction.” 2016. Web. 18 Jan 2021.
Vancouver:
Nair A. Panoramic Stereovision and Scene Reconstruction. [Internet] [Masters thesis]. Santa Clara University; 2016. [cited 2021 Jan 18].
Available from: https://scholarcommons.scu.edu/cseng_mstr/2.
Council of Science Editors:
Nair A. Panoramic Stereovision and Scene Reconstruction. [Masters Thesis]. Santa Clara University; 2016. Available from: https://scholarcommons.scu.edu/cseng_mstr/2
13.
Sun, Jingjing.
Quantitative body shape analysis for obesity evaluation.
Degree: PhD, Biomedical Engineering, 2018, University of Texas – Austin
URL: http://hdl.handle.net/2152/68266
► Obesity is a public health concern as it is associated with a number of diseases, such as diabetes mellitus type 2, cardiovascular disease, some forms…
(more)
▼ Obesity is a public health concern as it is associated with a number of diseases, such as diabetes mellitus type 2, cardiovascular disease, some forms of renal failure and certain types of cancers. Growing evidence suggests that it is not only the amount of fat, but also its distribution in the body that is important to predict metabolic risk factors and adverse changes in organs. In this respect, it is necessary to develop convenient and inexpensive measures to characterize human body fat distribution and to investigate the unknown linkage between intrinsic adiposity and external body shape.
This dissertation research aims to improve the obesity assessment by developing new quantitative measurements that comprehensively characterize body shape, and are highly relevant to intrinsic abdominal adiposity conditions. The proposed body shape descriptors were defined based on three-dimensional body images reconstructed from a custom-made
stereovision body imaging system, which is particularly suitable for clinical use as an obesity monitoring equipment for its high portability and affordability.
In this study, we developed a fully-automated algorithm to process T1-weighted magnetic resonance imaging (MRI) slices for abdominal adiposity measurements. This algorithm dramatically reduces the processing time and workload compared with traditional manual or semi-automatic methods for MRI processing, and greatly improves the repeatability and objectivity of fat assessments. A new obesity categorization method was then defined based on MRI adiposity data to depict characteristics of abdominal fat distribution, and the associations between the body shape descriptors and the MRI abdominal adiposity were explored. It was shown that the proposed body shape descriptors are able to capture the body shape differences between the subjects with dissimilar internal fat distribution (i.e., different categories), and to provide excellent prediction for the category of fat distribution through an optimized support-vector-machine classifier. The predictive models established in this dissertation demonstrate that the novel body shape descriptors were also effective for prediction of the volumes of abdominal visceral fat and subcutaneous fat accumulated in male and female adults.
This dissertation introduces an innovative approach to assess obesity and fat distribution based on newly defined shape descriptors, and provides new findings that reveal the associations of intrinsic fat distribution with external body shapes, which enable both qualitative and quantitative assessment of obesity from body shape measurements.
Advisors/Committee Members: Xu, Bugao (advisor), Markey, Mia K. (committee member), Jolly, Christopher A. (committee member), Ren, Pengyu (committee member), Milner, Thomas E. (committee member).
Subjects/Keywords: Body shape descriptors; T1-weighted MRI; Stereovision system
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Sun, J. (2018). Quantitative body shape analysis for obesity evaluation. (Doctoral Dissertation). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/68266
Chicago Manual of Style (16th Edition):
Sun, Jingjing. “Quantitative body shape analysis for obesity evaluation.” 2018. Doctoral Dissertation, University of Texas – Austin. Accessed January 18, 2021.
http://hdl.handle.net/2152/68266.
MLA Handbook (7th Edition):
Sun, Jingjing. “Quantitative body shape analysis for obesity evaluation.” 2018. Web. 18 Jan 2021.
Vancouver:
Sun J. Quantitative body shape analysis for obesity evaluation. [Internet] [Doctoral dissertation]. University of Texas – Austin; 2018. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/2152/68266.
Council of Science Editors:
Sun J. Quantitative body shape analysis for obesity evaluation. [Doctoral Dissertation]. University of Texas – Austin; 2018. Available from: http://hdl.handle.net/2152/68266
University of St. Andrews
14.
Zlatkute, Giedre.
Exploring depth and distance perception in strabismus
.
Degree: 2019, University of St. Andrews
URL: http://hdl.handle.net/10023/18959
► Strabismus can be defined as the inability to coordinate the eye muscles that ordinarily fixate the two eyes on a single target, resulting in lack…
(more)
▼ Strabismus can be defined as the inability to coordinate the eye muscles that ordinarily fixate the two eyes on a single target, resulting in lack of a single binocular vision. Strabismus as a disorder has been known since the times of Hippocrates. However, the exact extent of the limitations in depth and distance perception in strabismic individuals with limited or no binocular
stereovision in comparison to typically developed binocular individuals remains unclear. This thesis aimed to explore differences in depth perception between strabismic and non-strabismic individuals by examining qualitative aspects of depth perception, egocentric distance perception, and relative depth perception. These aspects were examined by conducting two experiments for each. The first two experiments revealed that feeling of immersive and tangible depth (a.k.a. stereopsis) is not uniquely linked to binocular disparities and may be experienced by individuals with varying levels of binocular
stereovision under monocular aperture viewing (evoking monocular stereopsis). The next two experiments explored egocentric distance perception by measuring familiar object size judgments (as a proxy for distance perception) under monocular, binocular, and stereoscopic viewing. All subjects made similar size judgments under all viewing conditions. The last two experiments showed that observers with no/limited
stereovision do not have deficits in the perception of relative depth from perspective cues. They showed similar levels of susceptibility and capacity to make depth judgements from the perspective cue to those of stereonormal individuals. The results of this thesis add systematic insight into understanding the way individuals with strabismus perceive depth and distance in comparison to typically developed binocular individuals. Overall, it suggests that there are more similarities between these two groups in the perception of 3D space than suggested by anecdotal reports and conjecture. This emphasizes the need for further systematic exploration to determine the specific limitations strabismics face whilst performing everyday tasks.
Advisors/Committee Members: Vishwanath, Dhanraj (advisor).
Subjects/Keywords: Strabismus;
Binocular stereovision;
Monocular stereopsis;
Egocentric distance;
Relative pictorial depth
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Zlatkute, G. (2019). Exploring depth and distance perception in strabismus
. (Thesis). University of St. Andrews. Retrieved from http://hdl.handle.net/10023/18959
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):
Zlatkute, Giedre. “Exploring depth and distance perception in strabismus
.” 2019. Thesis, University of St. Andrews. Accessed January 18, 2021.
http://hdl.handle.net/10023/18959.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zlatkute, Giedre. “Exploring depth and distance perception in strabismus
.” 2019. Web. 18 Jan 2021.
Vancouver:
Zlatkute G. Exploring depth and distance perception in strabismus
. [Internet] [Thesis]. University of St. Andrews; 2019. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/10023/18959.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zlatkute G. Exploring depth and distance perception in strabismus
. [Thesis]. University of St. Andrews; 2019. Available from: http://hdl.handle.net/10023/18959
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
15.
Moulon, Pierre.
Positionnement robuste et précis de réseaux d’images : Robust and accurate calibration of camera networks.
Degree: Docteur es, Signal, Image, Automatique, 2014, Université Paris-Est
URL: http://www.theses.fr/2014PEST1033
► Calculer une représentation 3D d'une scène rigide à partir d'une collection d'images est aujourd'hui possible grâce aux progrès réalisés par les méthodes de stéréo-vision multi-vues,…
(more)
▼ Calculer une représentation 3D d'une scène rigide à partir d'une collection d'images est aujourd'hui possible grâce aux progrès réalisés par les méthodes de stéréo-vision multi-vues, et ce avec un simple appareil photographique. Le principe de reconstruction, découlant de travaux de photogrammétrie, consiste à recouper les informations provenant de plusieurs images, prises de points de vue différents, pour identifier les positions et orientations relatives de chaque cliché. Une fois les positions et orientations de caméras déterminées (calibration externe), la structure de la scène peut être reconstruite. Afin de résoudre le problème de calcul de la structure à partir du mouvement des caméras (Structure-from-Motion), des méthodes séquentielles et globales ont été proposées. Par nature, les méthodes séquentielles ont tendance à accumuler les erreurs. Cela donne lieu le plus souvent à des trajectoires de caméras qui dérivent et, lorsque les photos sont acquises autour d'un objet, à des reconstructions où les boucles ne se referment pas. Au contraire, les méthodes globales considèrent le réseau de caméras dans son ensemble. La configuration de caméras est recherchée et optimisée pour conserver au mieux l'ensemble des contraintes de cyclicité du réseau. Des reconstructions de meilleure qualité peuvent être obtenues, au détriment toutefois du temps de calcul. Cette thèse propose d'analyser des problèmes critiques au cœur de ces méthodes de calibration externe et de fournir des solutions pour améliorer leur performance (précision, robustesse, vitesse) et leur facilité d'utilisation (paramétrisation restreinte).Nous proposons tout d'abord un algorithme de suivi de points rapide et efficace. Nous montrons ensuite que l'utilisation généralisée de l'estimation robuste de modèles paramétriques a contrario permet de libérer l'utilisateur du réglage de seuils de détection, et d'obtenir une chaine de reconstruction qui s'adapte automatiquement aux données. Puis dans un second temps, nous utilisons ces estimations robustes adaptatives et une formulation du problème qui permet des optimisations convexes pour construire une chaine de calibration globale capable de passer à l'échelle. Nos expériences démontrent que les estimations identifiées a contrario améliorent de manière notable la qualité d'estimation de la position et de l'orientation des clichés, tout en étant automatiques et sans paramètres, et ce même sur des réseaux de caméras complexes. Nous proposons enfin d'améliorer le rendu visuel des reconstructions en proposant une optimisation convexe de la consistance colorée entre images
To compute a 3D representation of a rigid scene from a collection of pictures is now possible thanks to the progress made by the multiple-view stereovision methods, even with a simple camera. The reconstruction process, arising from photogrammetry, consists in integrating information from multiple images taken from different viewpoints in order to identify the relative positions and orientations. Once the positions and orientations (external…
Advisors/Committee Members: Marlet, Renaud (thesis director).
Subjects/Keywords: Calibration; Stéréovision multi-Vue; Stéréovision; Estimation robuste; Programmation linéaire; Vision par ordinateur; Calibration; Multi view stereovision; Stereovision; Robust estimation; Linear programmation; Computer vision
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Moulon, P. (2014). Positionnement robuste et précis de réseaux d’images : Robust and accurate calibration of camera networks. (Doctoral Dissertation). Université Paris-Est. Retrieved from http://www.theses.fr/2014PEST1033
Chicago Manual of Style (16th Edition):
Moulon, Pierre. “Positionnement robuste et précis de réseaux d’images : Robust and accurate calibration of camera networks.” 2014. Doctoral Dissertation, Université Paris-Est. Accessed January 18, 2021.
http://www.theses.fr/2014PEST1033.
MLA Handbook (7th Edition):
Moulon, Pierre. “Positionnement robuste et précis de réseaux d’images : Robust and accurate calibration of camera networks.” 2014. Web. 18 Jan 2021.
Vancouver:
Moulon P. Positionnement robuste et précis de réseaux d’images : Robust and accurate calibration of camera networks. [Internet] [Doctoral dissertation]. Université Paris-Est; 2014. [cited 2021 Jan 18].
Available from: http://www.theses.fr/2014PEST1033.
Council of Science Editors:
Moulon P. Positionnement robuste et précis de réseaux d’images : Robust and accurate calibration of camera networks. [Doctoral Dissertation]. Université Paris-Est; 2014. Available from: http://www.theses.fr/2014PEST1033
Vanderbilt University
16.
Kumar, Ankur N.
Quantifying in vivo motion in video sequences using image registration.
Degree: PhD, Electrical Engineering, 2014, Vanderbilt University
URL: http://hdl.handle.net/1803/14690
► Image registration is a pivotal part of many medical imaging analysis systems that provide clinically relevant medical information. One fundamental problem addressed by image registration…
(more)
▼ Image registration is a pivotal part of many medical imaging analysis systems that provide clinically relevant medical information. One fundamental problem addressed by image registration is the accounting of a subject’s motion. This dissertation broadly addresses the problem of quantifying in vivo motion in video sequences for two different applications using image registration. The first problem involves the correction of motion in in vivo time-series microscopy imaging of islets of Langerhans in mice. The second problem focuses on delivering near real-time 3D intraoperative movements of the cortical surface to a computational biomechanical model framework for the compensation of brain shift during brain tumor surgery. For the first application, a fully automatic algorithm is developed for the correction of in vivo time-series microscopy images of islets of Langerhans. The second application focuses on delivering near real-time 3D intraoperative movements of the cortical surface to a computational biomechanical model framework for the compensation of brain shift during brain tumor surgery. This dissertation demonstrates a clinical microscope-based digitization platform capable of reliably providing temporally dense 3D textured point clouds in near real-time of the FOV for the entire duration and under realistic conditions of neurosurgery. A fully automatic technique has been developed for robustly digitizing 3D points intraoperatively using an operating microscope at 1Hz. Another algorithm has been developed for tracking points on the cortical surface intraoperatively, which can potentially deliver intraoperative 3D displacements of the cortical surface at different time points during brain tumor surgery.
Advisors/Committee Members: Dr. Michael Miga (committee member), Dr. Reid Thompson (committee member), Dr. Alan Peters (committee member), Dr. Bobby Bodenheimer (committee member), Dr. Dave Piston (committee member), Dr. Benoit Dawant (Committee Chair).
Subjects/Keywords: stereovision; image registration; in vivo; brain tumor surgery; image guided surgery; magnification
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kumar, A. N. (2014). Quantifying in vivo motion in video sequences using image registration. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/14690
Chicago Manual of Style (16th Edition):
Kumar, Ankur N. “Quantifying in vivo motion in video sequences using image registration.” 2014. Doctoral Dissertation, Vanderbilt University. Accessed January 18, 2021.
http://hdl.handle.net/1803/14690.
MLA Handbook (7th Edition):
Kumar, Ankur N. “Quantifying in vivo motion in video sequences using image registration.” 2014. Web. 18 Jan 2021.
Vancouver:
Kumar AN. Quantifying in vivo motion in video sequences using image registration. [Internet] [Doctoral dissertation]. Vanderbilt University; 2014. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/1803/14690.
Council of Science Editors:
Kumar AN. Quantifying in vivo motion in video sequences using image registration. [Doctoral Dissertation]. Vanderbilt University; 2014. Available from: http://hdl.handle.net/1803/14690
17.
Ducarouge, Benoit.
Reconstruction 3D infrarouge par perception active : 3D infrared reconstruction with active perception.
Degree: Docteur es, Systèmes Industriels et Systèmes Informatiques, 2011, Toulouse, INSA
URL: http://www.theses.fr/2011ISAT0042
► Ces travaux de thèse ont été menés dans le contexte du projet ANR blanc "Real Time and True Temperature measurement" (R3T), dédié à la métrologie…
(more)
▼ Ces travaux de thèse ont été menés dans le contexte du projet ANR blanc "Real Time and True Temperature measurement" (R3T), dédié à la métrologie thermique à partir de mesures dans l'infrarouge. L'estimation d'une température vraie à partir d'une mesure de température apparente par une caméra infrarouge, exploite un modèle radiométrique dans lequel apparaît des facteurs qui dépendent de la nature et de la forme de l'objet considéré. Ces travaux portent sur la construction d'un modèle géométrique de l'objet à partir de caméras infrarouges déplacées par un robot autour d'un objet.Ces caméras, par rapport à des caméras standards, ont des caractéristiques spécifiques : faible résolution, peu de texture. Afin de faciliter la mise en œuvre et de minimiser la complexité du système final, nous avons choisi une approche de stéréovision non calibrée. Nous avons donc un banc de stéréovision infrarouge embarqué sur un robot cartésien, pour acquérir plusieurs vues de l'objet d'intérêt ; les principales étapes concernent la rectification non calibrée des images acquises par le banc stéréo, puis le calibrage des caméras rectifiées et de la relation main-œil sans utilisation de mire, puis la construction de modèles 3D locaux denses et le recalage de ces modèles partiels pour construire un modèle global de l'objet. Les contributions portent sur les deux premières étapes, rectification et calibrage pour la stéréovision. Pour la rectification non calibrée, il est proposé une approche d'optimisation sous contraintes qui estime les homographies, à appliquer sur ces images pour les rectifier, sans calcul préalable de la matrice Fondamentale, tout en minimisant les déformations projectives entre images d'origine et images rectifiées. La fonction coût est calculée à partir de la distance de Sampson avec une décomposition de la matrice fondamentale. Deux types de contraintes, géométriques et algébriques, sont comparés pour minimiser les déformations projectives. L'approche proposée est comparée aux méthodes proposées par Loop et Zhang, Hartley, Mallon et al... sur des jeux de données classiques de la littérature. Il est montré que les résultats sont au moins équivalents sur des images classiques et meilleurs sur des images de faible qualité comme des images infrarouges.Pour le calibrage sans mire, l'auteur propose de calibrer les caméras ainsi que la transformation main-œil, indispensable dès lors que le banc stéréo est porté par un robot, en une seule étape ; l'une des originalités est que cette méthode permet de calibrer les caméras préalablement rectifiées et ainsi de minimiser le nombre de paramètres à estimer. De même plusieurs critères sont proposés et évalués par de nombreux résultats sur des données de synthèse et sur des données réelles. Finalement, les méthodes de stéréovision testées pour ce contexte applicatif sont rapidement décrites ; des résultats expérimentaux acquis sur des objets sont présentés ainsi que des comparaisons vis-à-vis d'une vérité terrain connue
This dissertation was lead in the context of the R3T project…
Advisors/Committee Members: Devy, Michel (thesis director), Sentenac, Thierry (thesis director).
Subjects/Keywords: Infrarouge; Stéréovision; Autocalibrage; Reconstruction 3D; Infrared; Stereovision; Rectification; Autocalibration; 3D reconstruction; 621.3
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ducarouge, B. (2011). Reconstruction 3D infrarouge par perception active : 3D infrared reconstruction with active perception. (Doctoral Dissertation). Toulouse, INSA. Retrieved from http://www.theses.fr/2011ISAT0042
Chicago Manual of Style (16th Edition):
Ducarouge, Benoit. “Reconstruction 3D infrarouge par perception active : 3D infrared reconstruction with active perception.” 2011. Doctoral Dissertation, Toulouse, INSA. Accessed January 18, 2021.
http://www.theses.fr/2011ISAT0042.
MLA Handbook (7th Edition):
Ducarouge, Benoit. “Reconstruction 3D infrarouge par perception active : 3D infrared reconstruction with active perception.” 2011. Web. 18 Jan 2021.
Vancouver:
Ducarouge B. Reconstruction 3D infrarouge par perception active : 3D infrared reconstruction with active perception. [Internet] [Doctoral dissertation]. Toulouse, INSA; 2011. [cited 2021 Jan 18].
Available from: http://www.theses.fr/2011ISAT0042.
Council of Science Editors:
Ducarouge B. Reconstruction 3D infrarouge par perception active : 3D infrared reconstruction with active perception. [Doctoral Dissertation]. Toulouse, INSA; 2011. Available from: http://www.theses.fr/2011ISAT0042
Université Paris-Sud – Paris XI
18.
Bak, Adrien.
Cooperation stereo mouvement pour la detection des objets dynamiques : Stereo-Motion Cooperation - Dynamic Objects Detection.
Degree: Docteur es, Physique, 2011, Université Paris-Sud – Paris XI
URL: http://www.theses.fr/2011PA112208
► Un grand nombre d'applications de robotique embarquées pourrait bénéficier d'une détection explicite des objets mobiles. A ce jour, la majorité des approches présentées repose sur…
(more)
▼ Un grand nombre d'applications de robotique embarquées pourrait bénéficier d'une détection explicite des objets mobiles. A ce jour, la majorité des approches présentées repose sur la classification, ou sur une analyse structurelle de la scène (la V-Disparité est un bon exemple de ces approches). Depuis quelques années, nous sommes témoins d'un intérêt croissant pour les méthodes faisant collaborer activement l'analyse structurelle et l'analyse du mouvement. Ces deux processus sont en effet étroitement liés. Dans ce contexte, nous proposons, à travers de travail de thèse, deux approches différentes. Si la première fait appel à l'intégralité de l'information stéréo/mouvement, la seconde se penche sur le cas des capteurs monoculaires, et permet de retrouver une information partielle.La première approche présentée consiste en un système innovation d'odométrie visuelle. Nous avons en effet démontré que le problème d'odométrie visuelle peut être posé de façon linéaire, alors que l'immense majorité des auteurs sont contraint de faire appel à des méthodes d'optimisation non-linéaires. Nous avons également montré que notre approche permet d'atteindre, voire de dépasser le niveau de performances présenté par des système matériels haut de gamme (type centrale inertielle). A partir de ce système d'odométrie visuelle, nous définissons une procédure permettant de détecter les objets mobiles. Cette procédure repose sur une compensation de l'influence de l'égo-mouvement, puis une mesure du mouvement résiduel. Nous avons ensuite mené une réflexion de fond sur les limitations et les sources d'amélioration de ce système. Il nous est apparu que les principaux paramètres du système de vision (base, focale) ont un impact de premier plan sur les performances du détecteur. A notre connaissance, cet impact n'a jamais été décrit dans la littérature. Il nous semble cependant que nos conclusions peuvent constituer un ensemble de recommandations utiles à tout concepteur de système de vision intelligent.La seconde partie de ce travail porte sur les systèmes de vision monoculaire, et plus précisément sur le concept de C-Vélocité. Alors que la V-Disparité a défini une transformée de la carte de disparité permettant de mettre en avant certains plans de l'image, la C-Vélocité défini une transformée du champ de flot optique, et qui utilise la position du FoE, qui permet une détection facile de certains plans spécifiques de l'image. Dans ce travail, nous présentons une modification de la C-Vélocité. Au lieu d'utiliser un a priori sur l'égo-mouvement (la position du FoE) afin d'inférer la structure de la scène, nous utilisons un a priori sur la structure de la scène afin de localiser le FoE, donc d'estimer l'égo-mouvement translationnel. Les premiers résultats de ce travail sont encourageants et nous permettent d'ouvrir plusieurs pistes de recherches futures.
Many embedded robotic applications could benefit from an explicit detection of mobile objects. To this day, most approaches rely on classification, or on some structural scene analysis (for…
Advisors/Committee Members: Aubert, Didier (thesis director).
Subjects/Keywords: Odométrie Visuelle; Vision; Véhicules Intelligents; Stéréovision; Mouvement; Visual Odometry; Vision; Intelligent Vehicles; Stereovision; Motion
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bak, A. (2011). Cooperation stereo mouvement pour la detection des objets dynamiques : Stereo-Motion Cooperation - Dynamic Objects Detection. (Doctoral Dissertation). Université Paris-Sud – Paris XI. Retrieved from http://www.theses.fr/2011PA112208
Chicago Manual of Style (16th Edition):
Bak, Adrien. “Cooperation stereo mouvement pour la detection des objets dynamiques : Stereo-Motion Cooperation - Dynamic Objects Detection.” 2011. Doctoral Dissertation, Université Paris-Sud – Paris XI. Accessed January 18, 2021.
http://www.theses.fr/2011PA112208.
MLA Handbook (7th Edition):
Bak, Adrien. “Cooperation stereo mouvement pour la detection des objets dynamiques : Stereo-Motion Cooperation - Dynamic Objects Detection.” 2011. Web. 18 Jan 2021.
Vancouver:
Bak A. Cooperation stereo mouvement pour la detection des objets dynamiques : Stereo-Motion Cooperation - Dynamic Objects Detection. [Internet] [Doctoral dissertation]. Université Paris-Sud – Paris XI; 2011. [cited 2021 Jan 18].
Available from: http://www.theses.fr/2011PA112208.
Council of Science Editors:
Bak A. Cooperation stereo mouvement pour la detection des objets dynamiques : Stereo-Motion Cooperation - Dynamic Objects Detection. [Doctoral Dissertation]. Université Paris-Sud – Paris XI; 2011. Available from: http://www.theses.fr/2011PA112208
Brno University of Technology
19.
Lauko, Matúš.
Zhodnocení vlastností algoritmů stereovize v nástroji Computer Vision System pro MATLAB: Evaluation of stereovision algorithms in Computer Vision System for MATLAB.
Degree: 2019, Brno University of Technology
URL: http://hdl.handle.net/11012/39491
► This bachelor thesis is describing limits and features of stereovision application for space orientation using MATLAB tools. The intended use is for a robot. In…
(more)
▼ This bachelor thesis is describing limits and features of
stereovision application for space orientation using MATLAB tools. The intended use is for a robot. In practical part there is used Simulink 3D Animation Toolbox for scene creation. Frist part is a background research of computer vision,
stereovision and MATLAB toolboxes Computer Vision System Toolbox and Simulink 3D Animation Toolbox. In the next part there is a description of model which is used for testing computational algorithm. Subjects to test are speed and accuracy taking into account other factors.
Advisors/Committee Members: Grepl, Robert (advisor), Růžička, Michal (referee).
Subjects/Keywords: Počítačové videnie; Stereovízia; Computer Vision System Toolbox; Computer vision; Stereovision; Computer Vision System Toolbox
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lauko, M. (2019). Zhodnocení vlastností algoritmů stereovize v nástroji Computer Vision System pro MATLAB: Evaluation of stereovision algorithms in Computer Vision System for MATLAB. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/39491
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):
Lauko, Matúš. “Zhodnocení vlastností algoritmů stereovize v nástroji Computer Vision System pro MATLAB: Evaluation of stereovision algorithms in Computer Vision System for MATLAB.” 2019. Thesis, Brno University of Technology. Accessed January 18, 2021.
http://hdl.handle.net/11012/39491.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lauko, Matúš. “Zhodnocení vlastností algoritmů stereovize v nástroji Computer Vision System pro MATLAB: Evaluation of stereovision algorithms in Computer Vision System for MATLAB.” 2019. Web. 18 Jan 2021.
Vancouver:
Lauko M. Zhodnocení vlastností algoritmů stereovize v nástroji Computer Vision System pro MATLAB: Evaluation of stereovision algorithms in Computer Vision System for MATLAB. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/11012/39491.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lauko M. Zhodnocení vlastností algoritmů stereovize v nástroji Computer Vision System pro MATLAB: Evaluation of stereovision algorithms in Computer Vision System for MATLAB. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/39491
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Brno University of Technology
20.
Polák, Jaromir.
Zpracování stereo snímků na grafické kartě: GPU accelerated stereo image processing.
Degree: 2019, Brno University of Technology
URL: http://hdl.handle.net/11012/27482
This thesis deals with 3D reconstruction using stereo cameras. This work is to show the usefulness of GPU acceleration for sophisticated algorithm
Advisors/Committee Members: Richter, Miloslav (advisor), Honec, Peter (referee).Subjects/Keywords: 3D rekonstrukce; stereovidění; kalibrace; rektifikace; CUDA; GPU; 3D reconstructions; stereovision; CUDA; GPU
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Polák, J. (2019). Zpracování stereo snímků na grafické kartě: GPU accelerated stereo image processing. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/27482
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):
Polák, Jaromir. “Zpracování stereo snímků na grafické kartě: GPU accelerated stereo image processing.” 2019. Thesis, Brno University of Technology. Accessed January 18, 2021.
http://hdl.handle.net/11012/27482.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Polák, Jaromir. “Zpracování stereo snímků na grafické kartě: GPU accelerated stereo image processing.” 2019. Web. 18 Jan 2021.
Vancouver:
Polák J. Zpracování stereo snímků na grafické kartě: GPU accelerated stereo image processing. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/11012/27482.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Polák J. Zpracování stereo snímků na grafické kartě: GPU accelerated stereo image processing. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/27482
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
University of South Florida
21.
Day, Brian.
Optimization of Proximity Judgment.
Degree: 2011, University of South Florida
URL: https://scholarcommons.usf.edu/etd/3066
► As humans, we have evolved to see in three dimensions. Our ancestors developed two eyes that only look forward, which allows the visual area that…
(more)
▼ As humans, we have evolved to see in three dimensions. Our ancestors developed two eyes that only look forward, which allows the visual area that can perceive depth to be most of the field of view. A variety of sensors have been developed which can determine depth in the environment. They range from producing individual points of depth to the depth of everything in the environment. These sensors have become cheap and can now reliably produce accurate depth. Research is needed to determine how to present the proximity information to the people using the sensors. Touch, sound, and vision have all been used to provide depth information to the users. This research focuses on vision and compares methods of visually presenting proximity information to a user. The methods examined are stereovision and false color visual proximity mapping. False color mapping proved most effective while, surprisingly, stereovision was not helpful.
Subjects/Keywords: Computer Vision; Depth Cues; False Color; Stereovision; Teleoperation; American Studies; Arts and Humanities; Computer Sciences
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Day, B. (2011). Optimization of Proximity Judgment. (Thesis). University of South Florida. Retrieved from https://scholarcommons.usf.edu/etd/3066
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):
Day, Brian. “Optimization of Proximity Judgment.” 2011. Thesis, University of South Florida. Accessed January 18, 2021.
https://scholarcommons.usf.edu/etd/3066.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Day, Brian. “Optimization of Proximity Judgment.” 2011. Web. 18 Jan 2021.
Vancouver:
Day B. Optimization of Proximity Judgment. [Internet] [Thesis]. University of South Florida; 2011. [cited 2021 Jan 18].
Available from: https://scholarcommons.usf.edu/etd/3066.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Day B. Optimization of Proximity Judgment. [Thesis]. University of South Florida; 2011. Available from: https://scholarcommons.usf.edu/etd/3066
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
22.
Ouyang, Wenbin, active 2013.
Evaluating fabric pilling/wrinkling appearance using 3D images.
Degree: MSin Textile and Apparel Technology, Textiles and Apparel Technology, 2013, University of Texas – Austin
URL: http://hdl.handle.net/2152/23656
► Fabric appearance is usually the highest priority consideration for consumers. Pilling and wrinkling are two major factors which cause the fabric to have a worse…
(more)
▼ Fabric appearance is usually the highest priority consideration for consumers. Pilling and wrinkling are two major factors which cause the fabric to have a worse appearance after a certain service period. In order to prevent more piling and wrinkling, a fabric pilling and wrinkling severity evaluation is very important. Traditional visual examination needs at least three trained experts to judge each sample, which is both subjective and time-consuming. Objective, high efficiency, and automatic pilling and wrinkling evaluation based on computer processing techniques are now being developed quickly.
In this study, an integrated fabric pilling and wrinkling measurement system based on
stereovision was developed. The hardware part of the system consists of a pair of consumer high resolution cameras and a mounting stage, which is affordable and portable in comparison with other 3D imaging systems. A novel pilling detection algorithm focusing on 3D image local information was proposed to extract three pilling features including pilling density, pilling average height, and pilling average size. The logistic regression classifier was applied for pilling severity classification because it showed a good accuracy with 80% on the 120 3D pilling images.
A fast wrinkle detection algorithm with leveled 3D fabric surface was developed to measure wrinkle density, hardness, tip-angle, and roughness. According to these four wrinkling features, 180 3D wrinkling images were tested by the logistic regression classifier with an overall 74.4% accuracy in comparison with visual judging results.
Both pilling and wrinkling results obtained from the proposed automatic 3D fabric pilling and wrinkling severity evaluation system were consistent with the subjective visual evaluation results. The system is ready for practical use.
Advisors/Committee Members: Xu, Bugao (advisor).
Subjects/Keywords: Pilling; Wrinkling; Stereovision; 3D image
…6
Figure 2.1 Stereovision system setup… …12
Figure 2.2 Principle of stereovision… …Compared to scanning-based 3D sensing technology, stereovision appears to be a
more efficient and… …stereovision system can possess high resolutions in x, y and z, and
generate a 3D image that shows… …information of a fabric surface. 3D fabric images
are first generated using a stereovision system…
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Ouyang, Wenbin, a. 2. (2013). Evaluating fabric pilling/wrinkling appearance using 3D images. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/23656
Chicago Manual of Style (16th Edition):
Ouyang, Wenbin, active 2013. “Evaluating fabric pilling/wrinkling appearance using 3D images.” 2013. Masters Thesis, University of Texas – Austin. Accessed January 18, 2021.
http://hdl.handle.net/2152/23656.
MLA Handbook (7th Edition):
Ouyang, Wenbin, active 2013. “Evaluating fabric pilling/wrinkling appearance using 3D images.” 2013. Web. 18 Jan 2021.
Vancouver:
Ouyang, Wenbin a2. Evaluating fabric pilling/wrinkling appearance using 3D images. [Internet] [Masters thesis]. University of Texas – Austin; 2013. [cited 2021 Jan 18].
Available from: http://hdl.handle.net/2152/23656.
Council of Science Editors:
Ouyang, Wenbin a2. Evaluating fabric pilling/wrinkling appearance using 3D images. [Masters Thesis]. University of Texas – Austin; 2013. Available from: http://hdl.handle.net/2152/23656
23.
Toulouse, Tom.
Estimation par stéréovision multimodale de caractéristiques géométriques d’un feu de végétation en propagation : Estimation by multimodal stereovision of geometrical characteristics of propagating vegetation fire.
Degree: Docteur es, Automatique, Signal, Productique, Robotique, 2015, Corte; Université Laval (Québec, Canada)
URL: http://www.theses.fr/2015CORT0009
► Les travaux menés dans cette thèse concernent le développement d'un dispositif de vision permettant l'estimation de caractéristiques géométriques d'un feu de végétation en propagation. Ce…
(more)
▼ Les travaux menés dans cette thèse concernent le développement d'un dispositif de vision permettant l'estimation de caractéristiques géométriques d'un feu de végétation en propagation. Ce dispositif est composé de plusieurs systèmes de stéréovision multimodaux générant des paires d'images stéréoscopiques à partir desquelles des points tridimensionnels sont calculés et les caractéristiques géométriques de feu tels que sa position, vitesse, hauteur, profondeur, inclinaison, surface et volume sont estimées. La première contribution importante de cette thèse est la détection de pixels de feu de végétation. Tous les algorithmes de détection de pixels de feu de la littérature ainsi que ceux développés dans le cadre de cette thèse ont été évalués sur une base de 500 images de feux de végétation acquises dans le domaine du visible et caractérisées en fonction des propriétés du feu dans l'image (couleur, fumée, luminosité). Cinq algorithmes de détection de pixels de feu de végétation basés sur la fusion de données issues d'images acquises dans le domaine du visible et du proche-infrarouge ont également été développés et évalués sur une autre base de données composée de 100 images multimodales caractérisées. La deuxième contribution importante de cette thèse concerne l'utilisation de méthodes de fusion d'images pour l'optimisation des points appariés entre les images multimodales stéréoscopiques.La troisième contribution importante de cette thèse est l'estimation des caractéristiques géométriques de feu à partir de points tridimensionnels obtenus depuis plusieurs paires d'images stéréoscopiques et recalés à l'aide de relevés GPS et d'inclinaison de tous les dispositifs de vision.Le dispositif d'estimation de caractéristiques géométriques à partir de systèmes de stéréovision a été évalué sur des objets rigides de dimensions connues et a permis d'obtenir les informations souhaitées avec une bonne précision. Les résultats des données obtenues pour des feux de végétation en propagation sont aussi présentés.
This thesis presents the geometrical characteristics measurement of spreading vegetation fires with multimodal stereovision systems. Image processing and 3D registration are used in order to obtain a three-dimensional modeling of the fire at each instant of image acquisition and then to compute fire front characteristics like its position, its rate of spread, its height, its width, its inclination, its surface and its volume. The first important contribution of this thesis is the fire pixel detection. A benchmark of fire pixel detection algorithms and of those that are developed in this thesis have been on a database of 500 vegetation fire images of the visible spectra which have been characterized according to the fire properties in the image (color, smoke, luminosity). Five fire pixel detection algorithms based on fusion of data from visible and near-infrared spectra images have also been developed and tested on another database of 100 multimodal images. The second important contribution of this thesis is about the use of…
Advisors/Committee Members: Rossi-Tison, Lucile (thesis director), Maldague, Xavier P. V. (thesis director).
Subjects/Keywords: Feux de forêt; Stéréovision; Traitement d’images; Segmentation; Multimodal; Wildland fire; Stereovision; Image processing; Segmentation; Multimodal; 634.96; 003.3
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Toulouse, T. (2015). Estimation par stéréovision multimodale de caractéristiques géométriques d’un feu de végétation en propagation : Estimation by multimodal stereovision of geometrical characteristics of propagating vegetation fire. (Doctoral Dissertation). Corte; Université Laval (Québec, Canada). Retrieved from http://www.theses.fr/2015CORT0009
Chicago Manual of Style (16th Edition):
Toulouse, Tom. “Estimation par stéréovision multimodale de caractéristiques géométriques d’un feu de végétation en propagation : Estimation by multimodal stereovision of geometrical characteristics of propagating vegetation fire.” 2015. Doctoral Dissertation, Corte; Université Laval (Québec, Canada). Accessed January 18, 2021.
http://www.theses.fr/2015CORT0009.
MLA Handbook (7th Edition):
Toulouse, Tom. “Estimation par stéréovision multimodale de caractéristiques géométriques d’un feu de végétation en propagation : Estimation by multimodal stereovision of geometrical characteristics of propagating vegetation fire.” 2015. Web. 18 Jan 2021.
Vancouver:
Toulouse T. Estimation par stéréovision multimodale de caractéristiques géométriques d’un feu de végétation en propagation : Estimation by multimodal stereovision of geometrical characteristics of propagating vegetation fire. [Internet] [Doctoral dissertation]. Corte; Université Laval (Québec, Canada); 2015. [cited 2021 Jan 18].
Available from: http://www.theses.fr/2015CORT0009.
Council of Science Editors:
Toulouse T. Estimation par stéréovision multimodale de caractéristiques géométriques d’un feu de végétation en propagation : Estimation by multimodal stereovision of geometrical characteristics of propagating vegetation fire. [Doctoral Dissertation]. Corte; Université Laval (Québec, Canada); 2015. Available from: http://www.theses.fr/2015CORT0009
24.
Courchay, Jérôme.
Calibration par programmation linéaire et reconstruction spatio-temporelle à partir de réseaux d’images : Calibration with linear programming and spatio-temporal reconstruction from a network of cameras.
Degree: Docteur es, Informatique, 2011, Université Paris-Est
URL: http://www.theses.fr/2011PEST1014
► Le problème de la stéréovision à partir de caméras multiples calibrées capturant une scène fixe est étudié depuis plusieurs décennies. Les résultats présentés dans le…
(more)
▼ Le problème de la stéréovision à partir de caméras multiples calibrées capturant une scène fixe est étudié depuis plusieurs décennies. Les résultats présentés dans le benchmark de stéréovision proposé par Strecha et al., attestent de la qualité des reconstructions obtenues. En particulier, les travaux du laboratoire IMAGINE, mènent à des résultats visuellement impressionnant. Aussi, il devient intéressant de calibrer des scènes de plus en plus vastes, afin d'appliquer ces algorithmes de stéréovision de façon optimale. Trois objectifs essentiels apparaissent : – La précision de la calibration doit être améliorée. En effet comme pointé par Yasutaka Furukawa, même les benchmarks de stéréovision fournissent parfois des caméras bruitées à la précision imparfaite. Un des moyen d'améliorer les résultats de stéréovision est d'augmenter la précision de la calibration. – Il est important de pouvoir prendre en compte les cycles dans le graphe des caméras de façon globale. En effet la plupart des méthodes actuelles sont séquentielles, et dérivent. Ainsi ces méthodes ne garantissent pas, pour une très grande boucle, de retrouver cette configuration cyclique, mais peuvent plutôt retrouver une configuration des caméras en spirale. Comme on calibre des réseaux d'images, de plus en plus grand, ce point est donc crucial. – Pour calibrer des réseaux d'images très grands, il convient d'avoir des algorithmes rapides. Les méthodes de calibration que nous proposons dans la première partie, permettent de calibrer des réseaux avec une précision très proche de l'état de l'art. D'autre part elle permettent de gérer les contraintes de cyclicité par le biais d'optimisations linéaires sous contraintes linéaires. Ainsi ces méthodes permettent de prendre en compte les cycles et bénéficient de la rapidité de la programmation linéaire. Enfin, la recherche en stéréovision étant arrivée à maturité, il convient de s'intéresser à l'étape suivante, à savoir la reconstruction spatio-temporelle. La méthode du laboratoire IMAGINE représentant l'état de l'art en stéréovision, il est intéressant de développer cette méthode et de l'étendre à la reconstruction spatio-temporelle, c'est-à-dire la reconstruction d'une scène dynamique capturée par un dôme de caméras. Nous verrons cette méthode dans la seconde partie de ce manuscrit
The issue of retrieving a 3D shape from a static scene captured with multiple view point calibrated cameras has been deeply studied these last decades. Results presented in the stereovision benchmark made by Strecha et al., show the high quality of state of the art methods. Particularly, works from IMAGINE laboratory lead to impressive results. So, it becomes convenient to calibrate wider and wider scenes, in order to apply these stereovision algorithms to large scale scenes. Three main objectives appear : – The calibration accuracy should be improved. As stated by Yasutaka Furukawa, even stereovision benchmarks use noisy cameras. So one obvious way to improve stereovision, is to improve camera calibration. – It is crucial to take…
Advisors/Committee Members: Keriven, Renaud (thesis director).
Subjects/Keywords: Calibration; Stéréovision; Reconstruction Spatio-Temporelle; 3d; 4d; Calibration; Stereovision; Spatio-Temporal Reconstruction; 3d; 4d; Structure from motion
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Courchay, J. (2011). Calibration par programmation linéaire et reconstruction spatio-temporelle à partir de réseaux d’images : Calibration with linear programming and spatio-temporal reconstruction from a network of cameras. (Doctoral Dissertation). Université Paris-Est. Retrieved from http://www.theses.fr/2011PEST1014
Chicago Manual of Style (16th Edition):
Courchay, Jérôme. “Calibration par programmation linéaire et reconstruction spatio-temporelle à partir de réseaux d’images : Calibration with linear programming and spatio-temporal reconstruction from a network of cameras.” 2011. Doctoral Dissertation, Université Paris-Est. Accessed January 18, 2021.
http://www.theses.fr/2011PEST1014.
MLA Handbook (7th Edition):
Courchay, Jérôme. “Calibration par programmation linéaire et reconstruction spatio-temporelle à partir de réseaux d’images : Calibration with linear programming and spatio-temporal reconstruction from a network of cameras.” 2011. Web. 18 Jan 2021.
Vancouver:
Courchay J. Calibration par programmation linéaire et reconstruction spatio-temporelle à partir de réseaux d’images : Calibration with linear programming and spatio-temporal reconstruction from a network of cameras. [Internet] [Doctoral dissertation]. Université Paris-Est; 2011. [cited 2021 Jan 18].
Available from: http://www.theses.fr/2011PEST1014.
Council of Science Editors:
Courchay J. Calibration par programmation linéaire et reconstruction spatio-temporelle à partir de réseaux d’images : Calibration with linear programming and spatio-temporal reconstruction from a network of cameras. [Doctoral Dissertation]. Université Paris-Est; 2011. Available from: http://www.theses.fr/2011PEST1014
25.
Pierré, Jean-Emmanuel.
Stéréo corrélation d'images numériques éléments finis : application à la validation de modèles de structures composites sous sollicitations complexes : Finite element based stereo digital image correlation : application to the validation of composite structures models complex loading.
Degree: Docteur es, Genie civil, 2016, Université Toulouse III – Paul Sabatier
URL: http://www.theses.fr/2016TOU30291
► Le projet VERTEX, dans lequel s'inscrivent ces travaux, a pour objectif de valider des modèles composites par essais statiques multi-axiaux sur des éprouvettes à l'échelle…
(more)
▼ Le projet VERTEX, dans lequel s'inscrivent ces travaux, a pour objectif de valider des modèles composites par essais statiques multi-axiaux sur des éprouvettes à l'échelle des détails structuraux. Le positionnement à cette échelle nécessite de développer de nouveaux outils d'instrumentation et de dialogue essais/calculs, qui sont au cœur de cette thèse. Compte-tenu de la complexité de ce type d'essai, nous nous intéressons ici à la Stéréo Corrélation d'Images Numériques (SCIN) puisqu'elle permet d'accéder à un champ de déplacement 3D à la surface du spécimen. Néanmoins, si l'on s'en tient à des approches classiques, il est difficile de faire une comparaison quantitative entre un champ mesuré et un champ simulé par Éléments Finis (EF). Ainsi dans ce travail, un formalisme est développé pour réaliser une mesure par SCIN dans l'espace physique en se basant sur un modèle EF (calibration de modèles non-linéaires de caméra, mesure de forme EF, mesure de champs EF). Cette méthode donne accès à un champ de déplacement expérimental directement exprimé dans les repère et support EF de la simulation, ce qui simplifie considérablement la validation. Pour valider un modèle à l'échelle des détails structuraux, la question des conditions aux limites est fondamentale. Cette question est d'autant plus complexe que la mesure cinématique se limite à la surface visible. En plus de cette mesure surfacique, il est envisagé ici d'estimer les conditions aux limites dans l'épaisseur en s'appuyant sur un modèle de type plaque/coque (classique ou volumique) et en y accordant plus ou moins de confiance (approches régularisée ou intégrée dans tout ou partie de l'éprouvette). La méthodologie est implémentée dans un logiciel académique et est appliquée sur des essais synthétiques. Une instrumentation adaptée au banc VERTEX a également permis l'analyse des essais réalisés dans le projet.
VERTEX Project, to which this thesis belongs, aims to validate composite models by multi-axial static tests on specimens at the level of structural details. The positioning on this scale requires the development of both new instrumentation techniques and tools for the test/simulation dialogue, which are at the heart of this thesis. Given the complexity of this type of experiments, we focus here on Stereo Digital Image Correlation (SDIC) since it yields 3D displacement fields on the surface of the specimen. However, if we stick to conventional approaches, it is difficult to make quantitative comparisons between a measured field and a Finite Element (FE) simulated field. Thus, in this work, a framework is developed to make a measurement by SDIC in the physical coordinate system based on an FE model (calibration of non-linear camera models , FE shape measurement, FE field measurement). This method gives access to experimental displacement fields directly expressed both in the coordinate system and support of the FE simulation, which considerably simplifies validation. To validate a model at the scale of structural details, the question of boundary conditions is…
Advisors/Committee Members: Périé, Jean-Noël (thesis director), Passieux, Jean-Charles (thesis director).
Subjects/Keywords: Corrélation d'images numériques; Stéréovision; Eléments finis; Régularisation mécanique; Structures élancées; Digital image correlation; Stereovision; Finite element; Mechanical regularization; Slender structures
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Pierré, J. (2016). Stéréo corrélation d'images numériques éléments finis : application à la validation de modèles de structures composites sous sollicitations complexes : Finite element based stereo digital image correlation : application to the validation of composite structures models complex loading. (Doctoral Dissertation). Université Toulouse III – Paul Sabatier. Retrieved from http://www.theses.fr/2016TOU30291
Chicago Manual of Style (16th Edition):
Pierré, Jean-Emmanuel. “Stéréo corrélation d'images numériques éléments finis : application à la validation de modèles de structures composites sous sollicitations complexes : Finite element based stereo digital image correlation : application to the validation of composite structures models complex loading.” 2016. Doctoral Dissertation, Université Toulouse III – Paul Sabatier. Accessed January 18, 2021.
http://www.theses.fr/2016TOU30291.
MLA Handbook (7th Edition):
Pierré, Jean-Emmanuel. “Stéréo corrélation d'images numériques éléments finis : application à la validation de modèles de structures composites sous sollicitations complexes : Finite element based stereo digital image correlation : application to the validation of composite structures models complex loading.” 2016. Web. 18 Jan 2021.
Vancouver:
Pierré J. Stéréo corrélation d'images numériques éléments finis : application à la validation de modèles de structures composites sous sollicitations complexes : Finite element based stereo digital image correlation : application to the validation of composite structures models complex loading. [Internet] [Doctoral dissertation]. Université Toulouse III – Paul Sabatier; 2016. [cited 2021 Jan 18].
Available from: http://www.theses.fr/2016TOU30291.
Council of Science Editors:
Pierré J. Stéréo corrélation d'images numériques éléments finis : application à la validation de modèles de structures composites sous sollicitations complexes : Finite element based stereo digital image correlation : application to the validation of composite structures models complex loading. [Doctoral Dissertation]. Université Toulouse III – Paul Sabatier; 2016. Available from: http://www.theses.fr/2016TOU30291
26.
Datondji, Sokèmi René Emmanuel.
Stéréovision Omnidirectionnelle Large Entraxe pour la Supervision d'Intersections Routières : Wide-baseline Omnidirectional Stereovision for Intersection Monitoring.
Degree: Docteur es, Informatique, 2017, Normandie
URL: http://www.theses.fr/2017NORMR090
► La surveillance visuelle des objets dynamiques dans les carrefours routiers a été un sujet de recherche majeur au sein des communautés de vision par ordinateur…
(more)
▼ La surveillance visuelle des objets dynamiques dans les carrefours routiers a été un sujet de recherche majeur au sein des communautés de vision par ordinateur et de transports intelligents, ces dernières années. De nombreux projets ont été menés afin d’améliorer la sécurité dans le contexte très particulier des carrefours. Notre analyse approfondie de l’état de l’art révèle que la majorité des systèmes en bord de voie, utilisent la vision monoculaire. Dans cette thèse, nous présentons un systèmenon-intrusif, de stéréovision-fisheye à large entraxe. Le dispositif proposé est particulièrement adapté aux carrefours ruraux ou sans signalisation. Notre objectif principal est la localisation des véhicules afin de reconstruire leurs trajectoires. Pour ce faire, l’estimation de la calibration extrinsèque entre les caméras est nécessaire afin d’effectuer des analyses à l’échelle métrique. Cette tâche s’avère très complexe dans notre configuration de déploiement. En effet la grande distance entre les caméras, la différence de vue et la forte présence de végétation, rendent inapplicables les méthodes de calibration qui requièrent la mise en correspondance d’images de mires. Il est donc nécessaire d’avoir une solution indépendante de la géométrie de la scène. Ainsi, nous proposons une méthode automatique reposant sur l’idée que les véhicules mobiles peuvent être utilisés comme objets dynamiques de calibration. Il s’agit d’une approche de type Structure à partir du Mouvement, découplée en l’estimation de la rotation extrinsèque à partir de points de fuite, suivie du calcul de la translation extrinsèque à l’échelle absolue par mise en correspondance de plans virtuels. Afin de généraliser notre méthode, nous adoptons le modèle de caméra sphérique sous l’hypothèse d’un mouvement plan. Des expérimentations conduites en laboratoire, puis dans des carrefours en Normandie, permettent de valider notre approche. Les paramètres extrinsèques sont alors directement exploités pour la trajectographie métrique des véhicules, en vue d’évaluer le risque et procéder à un diagnostic des intersections rurales.
Visual surveillance of dynamic objects at road intersections has been an active research topic in the computer vision and intelligent transportations systems communities, over the past decades. Several projects have been carried out in order to enhance the safety of drivers in the special context of intersections. Our extensive review of related studies revealedthat most roadside systems are based on monocular vision and provide output results generally in the image domain. In this thesis, we introduce a non-intrusive, wide-baseline stereoscopic system composed of fisheye cameras, perfectly suitable for rural or unsignalized intersections. Our main goal is to achieve vehicle localization and metric trajectory estimation in the world frame. For this, accurate extrinsic calibration is required to compute metric information. But the task is quite challenging in this configuration, because of the wide-baseline, the strong view difference…
Advisors/Committee Members: Vasseur, Pascal (thesis director).
Subjects/Keywords: Vision par ordinateur; Stéréovision-fisheye; Sécurité routière; Stéréovision; Computer vision; Fisheye Stereovision; Traffic safety; Stereoscopic system; 006.4
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Datondji, S. R. E. (2017). Stéréovision Omnidirectionnelle Large Entraxe pour la Supervision d'Intersections Routières : Wide-baseline Omnidirectional Stereovision for Intersection Monitoring. (Doctoral Dissertation). Normandie. Retrieved from http://www.theses.fr/2017NORMR090
Chicago Manual of Style (16th Edition):
Datondji, Sokèmi René Emmanuel. “Stéréovision Omnidirectionnelle Large Entraxe pour la Supervision d'Intersections Routières : Wide-baseline Omnidirectional Stereovision for Intersection Monitoring.” 2017. Doctoral Dissertation, Normandie. Accessed January 18, 2021.
http://www.theses.fr/2017NORMR090.
MLA Handbook (7th Edition):
Datondji, Sokèmi René Emmanuel. “Stéréovision Omnidirectionnelle Large Entraxe pour la Supervision d'Intersections Routières : Wide-baseline Omnidirectional Stereovision for Intersection Monitoring.” 2017. Web. 18 Jan 2021.
Vancouver:
Datondji SRE. Stéréovision Omnidirectionnelle Large Entraxe pour la Supervision d'Intersections Routières : Wide-baseline Omnidirectional Stereovision for Intersection Monitoring. [Internet] [Doctoral dissertation]. Normandie; 2017. [cited 2021 Jan 18].
Available from: http://www.theses.fr/2017NORMR090.
Council of Science Editors:
Datondji SRE. Stéréovision Omnidirectionnelle Large Entraxe pour la Supervision d'Intersections Routières : Wide-baseline Omnidirectional Stereovision for Intersection Monitoring. [Doctoral Dissertation]. Normandie; 2017. Available from: http://www.theses.fr/2017NORMR090
Jönköping University
27.
Isaksson, David.
Diametermätning av timmer med stereovision.
Degree: Computer Science and Informatics, 2018, Jönköping University
URL: http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-41270
► Syfte – Syftet för den här studien är att utveckla en metod för att mäta diametern på travat timmers ändträytor i en bild med…
(more)
▼ Syfte – Syftet för den här studien är att utveckla en metod för att mäta diametern på travat timmers ändträytor i en bild med förvridet perspektiv där ytorna befinner sig på olika djup i förhållande till varandra, för att effektivisera mätning inom skogsindustrin. Metod – Denna studie genomfördes i samarbete med Cind AB, och arbetet var uppdelat i två faser med Design Science Research som forskningsmetod. I Fas 1 rektifierades bilder på ändträytorna manuellt och i Fas 2 utnyttjades ett punktmoln för att uppskatta rektifieringsplanet. Detta gjordes i en stereokamerarigg i skala 1:25 på 139 stockar. Samtliga stockar mättes digitalt i de rektifierade bilderna och manuellt med ett digitalt skjutmått. Ett konfidensintervall för differensen beräknades fram för att bedöma mätnoggrannheten. Resultat – Konfidensintervallet för Fas 1 tyder på att metoden har potential då rektifieringsplanet placeras korrekt, vilket Fas 2 visar är en svår och komplex uppgift. Slutsatser – Den utvecklade metodens mätnoggrannhet uppnådde inte studiens mål på 5% felmarginal. Det skulle dock vara möjligt att mäta ändträytor med god noggrannhet om punktmolnet har tillräckligt hög kvalitet. Begränsningar – Mjukvaran som använder punktmolnet för att rektifiera bilderna är en modifierad version av Cinds proprietära produkt. Datamängden som används i studien samlas endast in via Cinds testrigg.
Purpose – The purpose of this study is to develop a method for measuring the diameter of piled logs on a truck in a picture that has skewed perspective and where the end surfaces are at different depths in relation to each other. The intent of this method is to further streamline log measurement in the logging industry. Method – This study was conducted in collaboration with Cind AB, and the work was split in two phases with Design Science Research as research method. In Phase 1, images with log end surfaces were rectified manually, and in Phase 2 a point cloud was used to estimate the rectification plane. This was done with a stereo camera rig in scale 1:25 on a total of 139 logs. All logs were digitally measured in the rectified images and manually measured with a digital caliper. A confidence interval for the difference was calculated to assess the measurement accuracy. Findings – The confidence interval from Phase 1 indicates that the developed method has potential when the rectification plane is placed correctly, which Phase 2 shows is a difficult and complex task. Conclusions – The developed method did not reach the desired measurement accuracy of 5% margin of error, which means that the goal of the study was not achieved. It would be possible to measure the end surfaces of logs with high precision if the point cloud is of a sufficiently high quality. Limitations – The software that utilizes point cloud information to rectify the…
Subjects/Keywords: Computer vision; Stereo vision; Log inspection; Point cloud; Image rectification; Datorseende; Stereovision; Timmermätning; Punktmoln; Bildrektifiering; Computer Systems; Datorsystem
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Isaksson, D. (2018). Diametermätning av timmer med stereovision. (Thesis). Jönköping University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-41270
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):
Isaksson, David. “Diametermätning av timmer med stereovision.” 2018. Thesis, Jönköping University. Accessed January 18, 2021.
http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-41270.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Isaksson, David. “Diametermätning av timmer med stereovision.” 2018. Web. 18 Jan 2021.
Vancouver:
Isaksson D. Diametermätning av timmer med stereovision. [Internet] [Thesis]. Jönköping University; 2018. [cited 2021 Jan 18].
Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-41270.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Isaksson D. Diametermätning av timmer med stereovision. [Thesis]. Jönköping University; 2018. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-41270
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
28.
WANG DAOLEI.
Depth Recovery with Rectification using Single-Lens Prism based Stereovision System.
Degree: 2012, National University of Singapore
URL: http://scholarbank.nus.edu.sg/handle/10635/35831
Subjects/Keywords: Stereovision; rectification; stereo matching; reconstruction; single-lens; depth
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
DAOLEI, W. (2012). Depth Recovery with Rectification using Single-Lens Prism based Stereovision System. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/35831
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):
DAOLEI, WANG. “Depth Recovery with Rectification using Single-Lens Prism based Stereovision System.” 2012. Thesis, National University of Singapore. Accessed January 18, 2021.
http://scholarbank.nus.edu.sg/handle/10635/35831.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
DAOLEI, WANG. “Depth Recovery with Rectification using Single-Lens Prism based Stereovision System.” 2012. Web. 18 Jan 2021.
Vancouver:
DAOLEI W. Depth Recovery with Rectification using Single-Lens Prism based Stereovision System. [Internet] [Thesis]. National University of Singapore; 2012. [cited 2021 Jan 18].
Available from: http://scholarbank.nus.edu.sg/handle/10635/35831.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
DAOLEI W. Depth Recovery with Rectification using Single-Lens Prism based Stereovision System. [Thesis]. National University of Singapore; 2012. Available from: http://scholarbank.nus.edu.sg/handle/10635/35831
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
29.
KEE WEI LOON.
Depth recovery and parameter analysis using single-lens prism based stereovision system.
Degree: 2014, National University of Singapore
URL: http://scholarbank.nus.edu.sg/handle/10635/118287
Subjects/Keywords: stereovision; algorithm; correspondence; 3D; prism; parameter analysis
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
LOON, K. W. (2014). Depth recovery and parameter analysis using single-lens prism based stereovision system. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/118287
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):
LOON, KEE WEI. “Depth recovery and parameter analysis using single-lens prism based stereovision system.” 2014. Thesis, National University of Singapore. Accessed January 18, 2021.
http://scholarbank.nus.edu.sg/handle/10635/118287.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
LOON, KEE WEI. “Depth recovery and parameter analysis using single-lens prism based stereovision system.” 2014. Web. 18 Jan 2021.
Vancouver:
LOON KW. Depth recovery and parameter analysis using single-lens prism based stereovision system. [Internet] [Thesis]. National University of Singapore; 2014. [cited 2021 Jan 18].
Available from: http://scholarbank.nus.edu.sg/handle/10635/118287.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
LOON KW. Depth recovery and parameter analysis using single-lens prism based stereovision system. [Thesis]. National University of Singapore; 2014. Available from: http://scholarbank.nus.edu.sg/handle/10635/118287
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
30.
XIAO YONG.
Single-lens multi-ocular stereovision using prism.
Degree: 2006, National University of Singapore
URL: http://scholarbank.nus.edu.sg/handle/10635/15238
Subjects/Keywords: Stereovision; Binocular; Trinocular; Multi-Ocular; Single-Lens
Record Details
Similar Records
Cite
Share »
Record Details
Similar Records
Cite
« Share
❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
YONG, X. (2006). Single-lens multi-ocular stereovision using prism. (Thesis). National University of Singapore. Retrieved from http://scholarbank.nus.edu.sg/handle/10635/15238
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):
YONG, XIAO. “Single-lens multi-ocular stereovision using prism.” 2006. Thesis, National University of Singapore. Accessed January 18, 2021.
http://scholarbank.nus.edu.sg/handle/10635/15238.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
YONG, XIAO. “Single-lens multi-ocular stereovision using prism.” 2006. Web. 18 Jan 2021.
Vancouver:
YONG X. Single-lens multi-ocular stereovision using prism. [Internet] [Thesis]. National University of Singapore; 2006. [cited 2021 Jan 18].
Available from: http://scholarbank.nus.edu.sg/handle/10635/15238.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
YONG X. Single-lens multi-ocular stereovision using prism. [Thesis]. National University of Singapore; 2006. Available from: http://scholarbank.nus.edu.sg/handle/10635/15238
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
◁ [1] [2] [3] ▶
. 
Open Access Theses and Dissertations
