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 15 of 15 for “"shape perception"”.
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Aging and Stereoscopic Shape Perception
Past research on stereoscopic depth perception among the elderly has led to inconsistent findings. Some research on stereopsis and aging has found that younger and older adults are essentially the same in terms of their stereoscopic ability, while other research has found evidence of large …
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A Study of Visual Shape Perception
Made available in DSpace on 2014-12-10T20:13:39Z (GMT). No. of bitstreams: 1 7317314.pdf: 6636384 bytes, checksum: 0d5e9d3aa1216d3757ca2234ba7d6696 (MD5) Previous issue date: 1972
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3D shape perception from vision and touch
Perceiving accurate 3D object shape is important for robots to interact with the physical world. Current research along this direction has been primarily relying on visual observations. Vision, however useful, has inherent limitations due to occlusions and the 2D-3D ambiguities, especially for …
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Shape Perception of Clear Water in Photo-Realistic Images
Light plays a vital role in the perception of transparency, depth and shape of liquids. The perception of the surfaces of liquids is made possible with an understanding of refraction of light and knowledge of the underlying texture geometry. Given this, what specific characteristics of the natural …
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Visual optic flow processing for posture and 3D shape perception in primary open angle glaucoma
… for postural control and 3-dimensional (3D) shape perception. Histopathological and psychophysical studies support the view that primary open angle glaucoma (POAG) preferentially damages the magnocellular (M) pathway. As motion perception relies heavily on the M pathway, it follows that POAG …
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Shape from Gradients. A psychophysical and computational study of the role complex illumination gradients, such as shading and mutual illumination, play in three-dimensional shape perception.
… information about three-dimensional object shape from a wide range of sources. How effectively we can use these sources, and how they are combined to form a consistent and accurate percept of the 3D world is the focus of much research. In complex scenes inter-reflections of light between …
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"This is Almost an Identity for Me": Disposition, Academic Literacy, and the Experiences of Successful Student Writers
… explores how dispositions generate action and shape perception, how dispositions are shaped by experiences, and how dispositions function in relation to context. I argue that a dispositional framework offers a productive way to further our understanding of how students learn to write in the …
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The social determinants of alcohol abuse in Canadian Inuit
… of the Inuit, and looking at how these factors shape perception of life chances and result in high levels of alcohol abuse. This thesis argues that strategies for eliminating alcohol abuse which focus on improving the social conditions of the Canadian Inuit are more likely to be successful than …
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Apparent ridges for line drawing
Non-photorealistic line drawing depicts 3D shapes through the rendering of feature lines. A number of characterizations of relevant lines have been proposed but none of these definitions alone seem to capture all visually-relevant lines. We introduce a new definition of feature lines based on two …
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Experience and perception
To what extent can experience shape perception? In what ways does perception vary across people or even within the same person at different times? This thesis presents three lines of research examining the role of experience on perception. The first section presents evidence from synesthesia …
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From Waves to Touch: Advancing Ultrasound Haptics through Novel Modulation
… can elicit sensations in the human skin for 2D shapes, there is still much to be desired in terms of spatial precision for high-speed scanning points. Specifically, when points are scanned across the human palm at speeds greater than the shear speed of sound, a trailing Mach cone is produced …
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Assessing children's body shape and weight concern
Shape and weight over-concern and self-evaluation almost exclusively in these terms is a core feature of eating disorder psychopathology and it is this which is thought to drive weight control behaviours. The literature indicates concerns about weight and shape can be present in children at least …
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Modeling and Evaluating Human Sound Localization in the Natural Environment
… can reveal the real-world constraints that shape perception. In the second study, we ran a behavioral experiment to evaluate human sound localization in a naturalistic setting with natural sounds and identified specific sounds that are difficult for humans to localize. We assessed whether …
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THE FUNCTIONAL ROLES OF THE MOTION PERCEPTION SYSTEMS
… these sources of information. In the context of perception of time-to-contact, flow-based information is used to perceive objects moving at high velocity and disparity-based information is used to perceive objects moving at low velocity. When both are available, these cues are not combined. …
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Nutrition related health status and associated factors in juvenile male and female on remand detainees at entry into Pollsmoor correctional service facility in the Western Cape
… and alcohol an illicit substance use), body shape perception, and symptoms of depression and anxiety using the K10 tool. The following physical measures were taken: weight, height, triceps-skinfold, mid-upper arm circumference (MUAC) and maximum handgrip strength (MHGS). BMI and the corrected …