Abstract | ||
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A geometric model for a biologically-inspired visual front-end is proposed, based on an isotropic, scale-invariant two-form field. The model incorporates a foveal property typical of biological visual systems, with an approximately linear decrease of resolution as a function of eccentricity, and by a physical size constant that measures the radius of the geometric foveola, the central region characterized by maximal resolving power. It admits a description in singularity-free canonical coordinates generalizing the familiar log-polar coordinates and reducing to these in the asymptotic case of negligibly-sized geometric foveola or, equivalently, at peripheral locations in the visual field. It has predictive power to the extent that quantitative geometric relationships pertaining to retino-cortical magnification along the primary visual pathway, such as receptive field size distribution and spatial arrangement in retina and striate cortex, can be deduced in a principled manner. The biological plausibility of the model is demonstrated by comparison with known facts of human vision. |
Year | DOI | Venue |
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2014 | 10.3390/axioms3010070 | AXIOMS |
Keywords | Field | DocType |
foveal vision, retino-cortical magnification, resolution, log-polar coordinates | Receptive field,Cortical magnification,Log-polar coordinates,Geometric modeling,Canonical coordinates,Foveal,Geometry,Foveola,Visual field,Mathematics | Journal |
Volume | Issue | Citations |
3 | 1 | 0 |
PageRank | References | Authors |
0.34 | 6 | 1 |
Name | Order | Citations | PageRank |
---|---|---|---|
L. M. J. Florack | 1 | 1212 | 210.47 |