Neural Model of Rivalry Between Occlusion and Disparity Depth Signals.

K. F. Arrington

Neuroscience Abstracts, 1995; 21, p.125.

Abstract

Stereo cells fall into tuned disparity populations(eg. Zero, Near, Far). Here it is conjectured that T-junctionhypercomplex cells fall into tuned depth-relationship populationsbased on the depth tuning of the orthogonal complex cells that theysample for their respective post and lintel positions. The resultingT-junction populations would comprise: {Near lintel, Far post} =Occlusion, and {Far lintel, Near post} = Transparency. The case {Zerolintel, Zero post} does not seem to create a strong abutment percept,but rather is heavily biased toward an occlusion percept. Arrington &Held (1995) measured how rate and duty cycle of perceived depthoscillations vary as stereo disparity increasingly opposes theocclusion cue. Here a neural network circuit including a reciprocalinhibition oscillator is designed to test the above conjecture. Theability of the neural network to model the psychophysical data isdemonstrated.

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