Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 23 for “"Vision Science"”.
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Credibility of a Person-Centered Design Decision-making Prototype: Spaces for Older Persons with Vision Loss
… their visual needs in mind. As their field of vision decreases, people find it harder to identify an objects location, distance, and orientation. Elderly people with vision impairments usually find it harder to perform daily activities such as navigation through indoor spaces. Functional vision …
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Colour and Colour Vision in Late Nineteenth Century British Sciences
… sources to explore the origins of colour vision science in 19th century Britain. By drawing attention to wide ranging dialogues and disagreements between diverse figures with different visions of colour, including physicists David Brewster, James Clerk Maxwell, and Lord Rayleigh, …
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Learning to see : the early stages of perceptual organization
One of the great puzzles of vision science is how, over the course of development, the complex visual array comprising many regions of different colors and luminances is transformed into a sophisticated and meaningful constellation of objects. Gestaltists describe some of the rules that seem to …
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Comparison of tripolar and traditional recording of the pattern-reversal visual evoked potential: signal and noise
… potential paradigm familiar to the broader vision science community. Using standard clinical protocols, we qualitatively compare the morphology of the pattern-reversal visual evoked potential recorded simultaneously using tripolar EEG and emulated traditional EEG techniques from a small …
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A light in the dark; an investigation of fetal visual perception
… developmental psychology, medical imaging, and vision science. The overall aim of this work is to assess fetal visual function through novel experimental paradigms. We employed 2D ultrasound to visualize the fetal lens and index eye movements in response to light stimuli presented in utero. …
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A METHOD TO DEVELOP A COMPUTER-VISION BASED SYSTEM FOR THE AUTOMATIC DAIRY COW IDENTIFICATION AND BEHAVIOUR DETECTION IN FREE STALL BARNS
In this thesis, a method to develop a computer-vision based system (CVBS) for the automatic dairy cow identification and behaviour detection in free stall barns is proposed. Two different methodologies based on digital image processing were proposed in order to achieve dairy cow identification and …
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Ensemble Perception of Emotion: Incidental Effects of Social Identity
<p>Research in vision science suggests that people possess a perceptual mechanism – ensemble perception - which enables them to rapidly identify the characteristics of groups (e.g., emotion, sex-ratio, race-ratio). This work examined whether ensemble perceptions of groups are driven by the …
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A NEW APPROACH TO ALGORITHM-ORIENTED VISUAL PSYCHOPHYSICS
The goal of visual neuroscience is to understand how visual systems are able to reconstruct scenes, infer scene properties, and make inferences about the natural environment from a pair of retinal images. Some approaches use psychophysical methods, which allow for controlled sensory presentation …
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The Flexible Face: Unifying the Protocols of Facial Recognition Technologies
… (FRTs) ubiquitous field of automated vision. This dissertation excavates the past 200 years including case studies such as the Nippon Electric Company’s work on the first public demonstration of FRTs in 1970, the 1990s establishment of the massive dataset FERET, and the contemporary …
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Analysis of Zebrafish Optic Tectum Visual Processing Before and After Optic Nerve Crush
… the usefulness of the zebrafish as a model for vision science and neuroscience.
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Generalizable Representations for Vision in Biological and Artificial Neural Networks
… human perception and generative models. Human vision is characteristically flexible and generalizable. One of the persistent challenges of vision science is understanding the underlying representations that allow us to recognize objects and scene attributes across a diversity of environments. A …
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Spatial summation in the dark-adapted fovea
Purpose: Application of adaptive optics to vision science creates the potential to probe the link between the retinal mosaic and visual perception. However, cellular level interrogation requires small, threshold stimuli and an implicit detection model. Unfortunately the parameters governing …
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Individual Differences in Face Perception
Faces are ubiquitous in our daily lives, and our ability to perceive and process them drives many important tasks, such as identifying age, emotional state, and health. Despite a rich body of literature on face perception, the mechanisms involved in perceiving and interpreting faces remain …
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Computational models of the human visual cortex: on individual differences and ecologically valid input statistics
… the retina to high-level regions of the cortex. Vision science investigates these transformations that give rise to high-level processing of visual objects, such as object recognition. In this thesis I investigate computational models of the human visual cortex with regard to their ability to …
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Adaptive optics aberrometer and wavefront corrector using a twisted-nematic liquid-crystal on silicon chip
… and changing aberrations of the eye that affect vision acuity are compensated for in order to provide diffraction-limited imaging. This thesis investigates the aspects of establishing an adaptive optics system for the correction of ocular wavefront errors using a twistednematic liquid-crystal on …
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Perceptual Expectation
… philosophy of mind and the behavioral and brain sciences.</p>
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Collective Chemotaxis of Retinal Neural Cells from Drosophila Melanogaster in Controlled Microenvironments
<p>More than 172 million people are influenced by a retinal disorder that stems from either age-related or developmental causes. Of those, 1.5 million people endure a developmental retinal disorder. In the developing retina, neural cells undergo a series of highly complicated differentiation and …
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Controlled Migration of Retinal Progenitor Cells Within Electro-Chemotactic Fields
<p>Vision loss in retinal degenerative diseases is overwhelmingly attributed to damage and death of retinal photoreceptor cells. Studies in mouse retina have suggested that transplantation of isolated post-natal or stem cell-derived retinal progenitor cells (RPCs) to replace apoptotic or damaged …
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Horizontal and Vertical Eye and Head Movements during a Baseball Swing
The purpose of this experiment was to observe and classify the head and eye movements of experienced baseball players when they are trying to hit a baseball. More specifically, it was designed to determine if players track deep into the pitch trajectory when attempting to hit, and if they use a …
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Collective Behavior of Drosophila Melanogaster Neural Progenitor and Imaginal Disc Cells within Controlled Microenvironments
… in retinogenesis. The optic nerve is critical to vision and is developmentally preceded in Drosophila by a structure called the Optic Stalk (OS). Collective migration of neural and retinal progenitor cells (RPCs) from the developing brain lobes (DBL) to the Imaginal Disc (ID), through the OS, is a …
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