Probing the human stereoscopic system with reverse correlation

Article Abstract:

It has been possible to identify important information about the way in which the neural processing of binocular disparity leads to the perception of stereoscopic depth. Research into disparity processing in human vision using the psychophysical technique of reverse correlation has made it possible to highlight at least two separate stages in the generation of a full stereoscopic percept. In the initial stage, information from the two eyes is combined in a local, feature-specific way. In a later stage, the detailed matching of information between the two eyes is managed on a wider scale.

Visual perception

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Independent neural mechanisms for bright and dark information in binocular stereopsis

Article Abstract:

A psychophysical test to determine the visual pathways for brightness perception found that the neuron for darkness and brightness combine in the cortex of the retina and visual thalamus. Brightness is perceived by two independent cells, the on and off cells. The objects which differ from their background in brightness are perceived as being separate from the background but the features themselves which differ from each other in brightness are treated as being similar to each other.

Contrast sensitivity (Vision)

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Vertical disparities, differential perspective and binocular stereopsis

Article Abstract:

The human visual system can perceive variations in depth by using vertical disparities to provide a scale for the depth and size of stereoscopic surfaces. These vertical disparities result from the difference in perspective between the two eyes. A model of the visual system shows that differential horizontal as well as vertical perspective are involved in depth perception. Differential perspective cues also allow estimations of distance.

Models, Depth perception

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