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The spatial organization of human visual processing mechanisms| old_uid | 2629 |
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| title | The spatial organization of human visual processing mechanisms |
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| start_date | 2007/04/11 |
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| schedule | 16h-17h |
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| online | no |
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| details | Toute personne bienvenue |
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| summary | The elementary unit of visual processing is the neural receptive field, although its structure has recently been shown to have a strong contrast dependence and extended spatial interaction properties.
Psychophysically, the properties of such processing units may be assessed by spatial summation functions, but in order to do so it is necessary to analyze the properties of spatial summation in a parallel distribution processing network such as the human visual system. After reviewing the basic rules of such summation properties, I will describe recent work on the contrast-dependence of the receptive field structure for human spatial vision inferred from spatial summation and spatial interaction studies. The spatial summation approach can also be extended to the processing mechanisms of complex two-dimensional stimuli such as faces and the three-dimensional processing mechanisms of stereoscopic surfaces. These methods reveal unexpected properties of the elementary units of spatial organization in human vision. |
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| responsibles | McCormick, Ardoint |
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