subject:(Vision for action)

University of Edinburgh

1. Dimitriou, Panagiotis. Reaching and grasping familiar objects: The impact of recent training.

Degree: 2012, University of Edinburgh

► In the recent years a plethora of studies attempted to investigate the apparent dissociation between two anatomically and behaviourally observed visual systems: the dorsal and… (more)

Subjects/Keywords: Familiar size, vision for action, vision for perception, reaching and grasping; visual illusions of size

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dimitriou, P. (2012). Reaching and grasping familiar objects: The impact of recent training. (Thesis). University of Edinburgh. Retrieved from http://hdl.handle.net/1842/8478

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Dimitriou, Panagiotis. “Reaching and grasping familiar objects: The impact of recent training.” 2012. Thesis, University of Edinburgh. Accessed February 25, 2021. http://hdl.handle.net/1842/8478.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Dimitriou, Panagiotis. “Reaching and grasping familiar objects: The impact of recent training.” 2012. Web. 25 Feb 2021.

Vancouver:

Dimitriou P. Reaching and grasping familiar objects: The impact of recent training. [Internet] [Thesis]. University of Edinburgh; 2012. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/1842/8478.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Dimitriou P. Reaching and grasping familiar objects: The impact of recent training. [Thesis]. University of Edinburgh; 2012. Available from: http://hdl.handle.net/1842/8478

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Southern California

2. Khan, Furqan Muhammad. Analyzing human activities in videos using component based models.

Degree: PhD, Computer Science, 2013, University of Southern California

URL: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/300165/rec/823

► With cameras getting smaller, better and cheaper, the amount of videos produced these days has increased exponentially. Although not comprehensive by any means, the fact… (more)

▼ With cameras getting smaller, better and cheaper, the amount of videos produced these days has increased exponentially. Although not comprehensive by any means, the fact that about 35 hours of video is uploaded to YouTube every minute is indicative of the amount of data that is being generated. This is in addition to the videos recorded for surveillance by grocery stores and by security agencies at airports, train stations and streets. Whereas analysis of the video data is the core reason for surveillance data collection, services such as YouTube can also use video analysis to improve search and indexing tasks. However, due to extremely large amount of data generation, human video analysis is not feasible; therefore, development of methods which can automatically perform the intelligent task of visual understanding, specifically human activity recognition, has seen a lot of interest in past couple of decades. Such capability is also desired to improve human computer interaction. However, the associated problem of activity description, i.e., information about actor, location and object of information, has not got much attention despite its importance for surveillance and indexing tasks. In this thesis, I propose methods for automated action analysis, i.e., recognition and description of human activities in videos. ❧ The task of activity recognition is seemingly easily performed by humans but it is very difficult for machines. The key challenge lies in modeling of human actions and representation of transformation of visual data with time. This thesis contributes to provide possible solutions related to development of action models to facilitate action description which are general enough to capture large variations in an action class while allowing for robust discrimination of different action classes and corresponding inference mechanisms. I model actions as a composition of several primitive events and use graphical models to evaluate consistency of action models with video input. In the first part of the thesis, I use low-level features to capture the transformation of spatiotemporal data during the primitive event. In the second part, to facilitate description of activities, such as identification of actor and object of interaction, I decompose actions using high-level constructs, actors and objects. Primitive components represent properties of actors and their relationships with objects of interaction. In the end, I represent actions as transformation of actor's limbs (human pose) over time and decompose actions using key poses. I infer human pose, object of interaction and the action for each actor jointly using a dynamic Bayesian Network. ❧ This thesis furthers research on relatively ignored but more comprehensive problem of action analysis, i.e., action recognition with the associated problem of description. To support the thesis, I evaluated the presented algorithms on publicly available datasets. The performance metrics highlight effectiveness of my algorithms on datasets which offer large variations in… Advisors/Committee Members: Nevatia, Ramakant (Committee Chair), Medioni, Gerard G. (Committee Member), Medioni, Gérard G. (Committee Member), Jenkins, Brian Keith (Committee Member).

Subjects/Keywords: computer vision; human activity analysis; machine learning; artificial intelligence; surveillance systems; graphical networks for action analysis

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Khan, F. M. (2013). Analyzing human activities in videos using component based models. (Doctoral Dissertation). University of Southern California. Retrieved from http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/300165/rec/823

Chicago Manual of Style (16^th Edition):

Khan, Furqan Muhammad. “Analyzing human activities in videos using component based models.” 2013. Doctoral Dissertation, University of Southern California. Accessed February 25, 2021. http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/300165/rec/823.

MLA Handbook (7^th Edition):

Khan, Furqan Muhammad. “Analyzing human activities in videos using component based models.” 2013. Web. 25 Feb 2021.

Vancouver:

Khan FM. Analyzing human activities in videos using component based models. [Internet] [Doctoral dissertation]. University of Southern California; 2013. [cited 2021 Feb 25]. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/300165/rec/823.

Council of Science Editors:

Khan FM. Analyzing human activities in videos using component based models. [Doctoral Dissertation]. University of Southern California; 2013. Available from: http://digitallibrary.usc.edu/cdm/compoundobject/collection/p15799coll3/id/300165/rec/823

University of New South Wales

3. Mann, David Lindsay. Vision and expertise for interceptive actions in sport.

Degree: Optometry & Vision Science, 2010, University of New South Wales

URL: http://handle.unsw.edu.au/1959.4/44704 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:8004/SOURCE02?view=true

► Exquisite visually-guided movements underpin expertise in fast interceptive sports. The assumption that skilled performance relies on superior visual skills has been challenged by studies of… (more)

▼ Exquisite visually-guided movements underpin expertise in fast interceptive sports. The assumption that skilled performance relies on superior visual skills has been challenged by studies of sporting expertise which typically advocate vision to be a poor predictor of sporting success. This discordance is addressed in this thesis by examining whether visual degradation (in the form of blur) affects the performance of an interceptive action where successful execution demands precise spatial and temporal visual-motor control.The vision of skilled cricket batters was blurred using contact lenses (four increasing levels: plano, +1.00, +2.00, +3.00) in each of two experimental phases. In the first phase batters faced a bowling-machine and in-situ bowlers to examine the effect of blur on bat-ball interception. The highest level of blur (+3.00) was required to produce a significant decrease in batting performance when facing the bowling-machine at medium-paced ball-velocities (105-115 kph). A similar effect of blur was found when facing in-situ bowlers of comparable ball-velocity, however performance was found to be affected by a lower level of blur (+2.00) for faster-paced ball-velocities (120-130 kph). The +1.00 blur was concluded even at this higher ball-velocity to have no measurable effect on interceptive performance in a natural setting.The second phase sought to investigate the effect of blur on anticipation: a perceptual skill established to be an important component of expertise in many interceptive sports. It was established, using temporal occlusion of a bowling sequence, that optimal anticipation required an opportunity for bat-ball interception (facilitating close coupling between perception and action). Coupled anticipation demonstrated velocity-dependent resilience to blur; +3.00 and +2.00 were required for respective decreases in the anticipation of action-sequences for medium- and fast-paced ball-velocities. Remarkably, results suggest that blur may enhance uncoupled (verbal) anticipation according to the movement velocity of the bowler.Experimental results led to the conclusion that clear vision is not necessarily required for optimal interceptive performance, even when the demanding spatio-temporal task simulates the conditions experienced at the highest levels of competition. Results are interpreted based on the predictions of the dual-pathway theory of vision, including differences in the underlying visual information processed via these pathways. Advisors/Committee Members: Abernethy, Bruce, Institute of Human Performance, University of Hong Kong, Farrow, Damian, Skill Acquisition, Australian Institute of Sport, Dain, Stephen, Optometry & Vision Science, Faculty of Science, UNSW.

Subjects/Keywords: Interceptive actions; Vision; Sport; Dual pathway theory of vision; Dorsal; Ventral; Cricket; Vision-for-perception; Vision-for-action; Anticipation

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Mann, D. L. (2010). Vision and expertise for interceptive actions in sport. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/44704 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:8004/SOURCE02?view=true

Chicago Manual of Style (16^th Edition):

Mann, David Lindsay. “Vision and expertise for interceptive actions in sport.” 2010. Doctoral Dissertation, University of New South Wales. Accessed February 25, 2021. http://handle.unsw.edu.au/1959.4/44704 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:8004/SOURCE02?view=true.

MLA Handbook (7^th Edition):

Mann, David Lindsay. “Vision and expertise for interceptive actions in sport.” 2010. Web. 25 Feb 2021.

Vancouver:

Mann DL. Vision and expertise for interceptive actions in sport. [Internet] [Doctoral dissertation]. University of New South Wales; 2010. [cited 2021 Feb 25]. Available from: http://handle.unsw.edu.au/1959.4/44704 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:8004/SOURCE02?view=true.

Council of Science Editors:

Mann DL. Vision and expertise for interceptive actions in sport. [Doctoral Dissertation]. University of New South Wales; 2010. Available from: http://handle.unsw.edu.au/1959.4/44704 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:8004/SOURCE02?view=true

Vrije Universiteit Amsterdam

4. Doorn, W.T.A.M. van. Thorny issues in perception in action .

Degree: 2009, Vrije Universiteit Amsterdam

URL: http://hdl.handle.net/1871/19235

Subjects/Keywords: Visual information in perception and (for) action; perception; action; vision; eye movements; grasping catching; ventral; dorsal; visual illusions

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Doorn, W. T. A. M. v. (2009). Thorny issues in perception in action . (Doctoral Dissertation). Vrije Universiteit Amsterdam. Retrieved from http://hdl.handle.net/1871/19235

Chicago Manual of Style (16^th Edition):

Doorn, W T A M van. “Thorny issues in perception in action .” 2009. Doctoral Dissertation, Vrije Universiteit Amsterdam. Accessed February 25, 2021. http://hdl.handle.net/1871/19235.

MLA Handbook (7^th Edition):

Doorn, W T A M van. “Thorny issues in perception in action .” 2009. Web. 25 Feb 2021.

Vancouver:

Doorn WTAMv. Thorny issues in perception in action . [Internet] [Doctoral dissertation]. Vrije Universiteit Amsterdam; 2009. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/1871/19235.

Council of Science Editors:

Doorn WTAMv. Thorny issues in perception in action . [Doctoral Dissertation]. Vrije Universiteit Amsterdam; 2009. Available from: http://hdl.handle.net/1871/19235

University of Plymouth

5. Dixon, Thomas Oliver. An electrophysiological examination of visuomotor activity elicited by visual object affordances.

Degree: PhD, 2016, University of Plymouth

URL: http://hdl.handle.net/10026.1/6758

► A wide literature of predominantly behavioural experiments that use Stimulus Response Compatibility (SRC) have suggested that visual action information such as object affordance yields rapid… (more)

▼ A wide literature of predominantly behavioural experiments that use Stimulus Response Compatibility (SRC) have suggested that visual action information such as object affordance yields rapid and concurrent activation of visual and motor brain areas, but has rarely provided direct evidence for this proposition. This thesis examines some of the key claims from the affordance literature by applying electrophysiological measures to well established SRC procedures to determine the verities of the behavioural claims of rapid and automatic visuomotor activation evoked by viewing affording objects. The temporal sensitivity offered by the Lateralised Readiness Potential and by visual evoked potentials P1 and N1 made ideal candidates to assess the behavioural claims of rapid visuomotor activation by seen objects by examining the timecourse of neural activation elicited by viewing affording objects under various conditions. The experimental work in this thesis broadly confirms the claims of the behavioural literature however it also found a series of novel results that are not predicted by the behavioural literature due to limitations in reaction time measures. For example, while different classes of affordance have been shown to exert the same behavioural facilitation, electrophysiological measures reveal very different patterns of cortical activation for grip-type and lateralised affordances. These novel findings question the applicability of the label ‘visuomotor’ to grip-type affordance processing and suggest considerable revision to models of affordance. This thesis also offers a series of novel and surprising insights into the ability to dissociate afforded motor activity from behavioural output, into the relationship between affordance and early visual evoked potentials, and into affordance in the absence of the intention to act. Overall, this thesis provides detailed suggestions for considerable changes to current models of the neural activity underpinning object affordance.

Subjects/Keywords: 616.8; Affordance; visuomotor; Electroencephalography; EEG; Vision for action; Embodied Cognition; embodiment; embodied; cognitive neuroscience; cognitive; cognitive psychology; psychology; electrophysiology; affordance; object; stimulus response compatibility; compatibility effect; intentional action; absence of intention; compatibility; go; no go; backward mask; consecutive object presentation; p1; n1; visual; motor; lateralised readiness potential; LRP; grip; grasp; grip type; power grip; precision grip; visual evoked potential

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dixon, T. O. (2016). An electrophysiological examination of visuomotor activity elicited by visual object affordances. (Doctoral Dissertation). University of Plymouth. Retrieved from http://hdl.handle.net/10026.1/6758

Chicago Manual of Style (16^th Edition):

Dixon, Thomas Oliver. “An electrophysiological examination of visuomotor activity elicited by visual object affordances.” 2016. Doctoral Dissertation, University of Plymouth. Accessed February 25, 2021. http://hdl.handle.net/10026.1/6758.

MLA Handbook (7^th Edition):

Dixon, Thomas Oliver. “An electrophysiological examination of visuomotor activity elicited by visual object affordances.” 2016. Web. 25 Feb 2021.

Vancouver:

Dixon TO. An electrophysiological examination of visuomotor activity elicited by visual object affordances. [Internet] [Doctoral dissertation]. University of Plymouth; 2016. [cited 2021 Feb 25]. Available from: http://hdl.handle.net/10026.1/6758.

Council of Science Editors:

Dixon TO. An electrophysiological examination of visuomotor activity elicited by visual object affordances. [Doctoral Dissertation]. University of Plymouth; 2016. Available from: http://hdl.handle.net/10026.1/6758

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