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Etude de l'influence des disparités horizontales et verticales sur la perception de la profondeur en champ visuel périphérique

Abstract : The wearing of ophthalmic lenses creates a change of the binocular disparity pattern naturally present in the visual scene. These changes can modify depth perception, especially in peripheral vision. The identification of continuous variations of horizontal disparities induced by ophthalmic lenses led to study continuous patterns of horizontal disparity. This study showed that detection of depth deformation depended on horizontal disparity gradient and on the eccentricity at the beginning of disparity variation. Moreover, the visual system seems to be more sensitive to uncrossed disparity than crossed disparity. Horizontal disparities were then combined with vertical disparities, computed from 3D shapes from horizontal disparities, so as to be congruent or in conflict, or in differente depth planes. Vertical disparity can modify the sensitivity to horizontal disparity gradient, depending on the depth signs of horizontal and vertical disparities relative to the fixation plane. The horizontal and vertical disparities would have a specific role in depth perception all over the visual field: horizontal disparity, locally processed, gives the 3D shape; vertical disparity, globally processed, estimates the absolute distance relative to the fixation plane.
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https://tel.archives-ouvertes.fr/tel-00276430
Contributor : Céline Devisme <>
Submitted on : Tuesday, April 29, 2008 - 4:12:15 PM
Last modification on : Monday, December 14, 2020 - 9:48:40 AM
Long-term archiving on: : Friday, May 28, 2010 - 6:02:17 PM

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  • HAL Id : tel-00276430, version 1

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Céline Devisme. Etude de l'influence des disparités horizontales et verticales sur la perception de la profondeur en champ visuel périphérique. Physiologie [q-bio.TO]. Université Pierre et Marie Curie - Paris VI, 2008. Français. ⟨tel-00276430⟩

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