Mathematical investigations of visual perception
The following thesis is a collection of three papers devoted to various topics in visual perception. The first is a theoretical investigation of the fourier spectra of two commonly-used types of random-dot motion stimuli: random-walk stimuli, and limited-lifetime stimuli. The second is an experiment...
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| Format: | Dissertation |
| Language: | English |
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ProQuest Dissertations & Theses
01-01-2000
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| Online Access: | Get full text |
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| Summary: | The following thesis is a collection of three papers devoted to various topics in visual perception. The first is a theoretical investigation of the fourier spectra of two commonly-used types of random-dot motion stimuli: random-walk stimuli, and limited-lifetime stimuli. The second is an experimental work on perception of textures consisting of regularly-placed, randomly-oriented line segments, whose random lengths are drawn from two distinct types of distributions. These distributions are manipulated so as to elicit human sensitivity to changes in the mean and variance of the distribution and alternately to elicit sensitivity to changes in the occurrence of outlying (low probability) or extremal (minima and maxima) events. The third chapter is an experimental investigation of object recognition. “Bent paperclip”-like objects are manipulated in both length of component cylinders and angle between cylinders. The results disconfirm any purely two-dimensional model of object recognition, and are consistent with separate encodings for the shape of object parts and the spatial relationship thereof. |
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| ISBN: | 9780599572249 0599572248 |