The Neural Coding of Stereoscopic Depth

Citation Info

Izumi Ohzawa, Gregory C. DeAngelis, and Ralph D. Freeman
The Neural Coding of Stereoscopic Depth.
NeuroReport, 8 (no. 3): 3-12, 1997
[Mini Review]

Key words: binocular vision, stereopsis, simple cells, complex cells, disparity energy model, visual cortex


Download

Clicking either of the following will start a download of the document. Please note the file size.
(13 pages with 4 figures):
Acrobat file (NReport97.pdf -- 747kB)
Compressed PostScript file (NReport97.ps.Z -- 1.0MB, uncompressed 4.9MB)

Cover Photo (slide version of the cover photo of the issue containing the article)

About PostScript/Acrobat files and free viewers.

Press this button to send:

Abstract

Stereopsis is a process by which the visual system gauges the relative depth of objects in three-dimensional space by measuring minute positional differences between left and right images. According to the standard notion, this information is thought to be encoded in the primary visual cortex by differences in receptive field (RF) positions for the two eyes. We have developed an alternative model by which stereoscopic information is coded and transformed through a hierarchical chain of processing in the primary visual cortex. Initially, first-order neurons of the visual cortex, simple cells, encode depth information by a scheme based on differences in internal receptive field structure between left and right eyes. Further abstraction of information is achieved by a subset of second-order neurons, complex cells, that are well suited for the detection of depth information in a manner unaffected by positional variations of objects. We review physiological evidence from studies of the cat and monkey that are relevant to the proposed scheme.


See Also (for complete stories)