Effect of Disparity Noise on Stereoscopic Surface Perception in Human and Ideal Observers
نویسندگان
چکیده
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).
منابع مشابه
Stereoscopic depth cues can segment motion information.
Can the motion system selectively process elements at a particular depth? We attempted to answer this question using global coherence tasks in which signal and noise elements could be given different disparities. In experiment 1 we found that, if all the signal elements had a disparity different from that of the noise elements, performance was far better than when they had the same disparity (a...
متن کاملThe efficiency of depth discrimination for non-transparent and transparent stereoscopic surfaces
The perception of transparency in binocular vision presents a challenge for any model of stereopsis. We investigate here how well human observers cope with stereo transparency by comparing their efficiency between transparent and opaque depth judgments. In two experiments, the efficiency measure was computed relative to an ideal observer to take into account the larger correspondence ambiguity ...
متن کاملEarly dynamics of stereoscopic surface slant perception
Surface orientation is an important visual primitive that can be estimated from monocular or binocular (stereoscopic) signals. Changes in motor planning occur within about 200 ms after either type of signal is perturbed, but the time it takes for apparent (perceived) slant to develop from stereoscopic cues is not known. Apparent slant sometimes develops very slowly (Gillam, Chambers, & Russo, 1...
متن کاملDisparity-energy signals in perceived stereoscopic depth.
Stereopsis, the ability to sense the world in three dimensions (3D) from pairs of retinal images, functions when both images have corresponding elements. When observers view stereograms lacking a global match, they do not perceive 3D structure, whereas several cortical areas encode stereoscopic depth in the disparity energy. Whether these neural representations are exploited or ignored in perce...
متن کاملStarry night: a texture devoid of depth cues.
From a modern Bayesian point of view, the classic Julesz random-dot stereogram is a cue-conflict stimulus: Texture cues specify an unbroken, unslanted surface, in conflict with any variation in depth specified by binocular disparity. We introduce a new visual texture-the starry night texture (SNT)--that is incapable of conveying slant, depth edges, or texture boundaries, in a single view. For S...
متن کامل