| Disparity estimation through Green's functions of matching equations. | |
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MedLine Citation:
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PMID: 17762939 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Binocular disparities arise from positional differences of scene features projected in the two retinae, and constitute the primary sensory cue for stereo vision. Here we introduce a new computational model for disparity estimation, based on the Green's function of an image matching equation. When filtering a Gabor-function-modulated signal, the considered Green's function yields a similarly modulated but shifted version of the original signal. Since a Gabor function models the receptive field of a cortical simple cell, the Green's kernel thus allows the simulation of relative shifts between the cell's left and right binocular inputs. A measure of the local degree of matching of such shifted inputs can then be introduced which affords disparity estimation in a similar manner to the energy model of the complex cortical cells. We have therefore effectively reformulated, in physiologically plausible terms, an image matching approach to disparity estimation. Our experiments show that the Green's function method allows the detection of disparities both from random-dot and real-world stereograms. |
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Authors:
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José R A Torreão |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2007-08-29 |
Journal Detail:
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Title: Biological cybernetics Volume: 97 ISSN: 0340-1200 ISO Abbreviation: Biol Cybern Publication Date: 2007 Oct |
Date Detail:
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Created Date: 2007-10-02 Completed Date: 2008-01-04 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7502533 Medline TA: Biol Cybern Country: Germany |
Other Details:
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Languages: eng Pagination: 307-16 Citation Subset: IM |
Affiliation:
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Instituto de Computação, Universidade Federal Fluminense, 24210-240 Niterói, RJ, Brazil. jrat@ic.uff.br |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Action Potentials
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physiology* Algorithms Animals Computer Simulation* Functional Laterality / physiology Humans Models, Neurological Neurons / physiology* Retina / physiology* Vision, Binocular / physiology* Visual Cortex / physiology* Visual Fields / physiology Visual Pathways / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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