Effect of disparity noise on sterescopic surface perception in human and ideal observers

Stereoscopic surface detection of human and ideal observers was assessed using a signal detection paradigm. Signal displays were disparity defined sinusoidal or square wave corrugations in depth containing various amounts of additive disparity noise. Distracter displays were created by scrambling pure signal stimuli along the vertical dimension destroying surface representation while leaving the depth range intact. Additive disparity noise was found to interfere with stereoscopic surface detection for both human and ideal observers. Efficiencies found for stereoscopic surface detection were similar to those found previously for detection of a single step edge in depth (a supposedly easier task).

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