Binocular vision enhances target detection by filtering the background.
In previous studies the authors have shown that the enhanced detectability exhibited by stereoscopically viewed targets can be accounted for by assuming that the binocular system can linearly summate the left-eye and right-eye views of a visual scene. A model based upon this assumption leads to a variety of predictions concerning the detectability of noise-embedded targets. One such prediction is that the detectability of a target in these conditions is highly orientation specific. A test is reported of such a prediction that can be regarded as counter-intuitive: namely, that the detectability, under stereoscopic viewing conditions, of a patch of sinusoidal grating masked by Gaussian noise should change substantially when the grating, oriented at 45 degrees, is rotated until its orientation becomes -45 degrees. The implications of these results for an understanding of the phenomenon of camouflage breaking are discussed.
Schneider
B
B
Department of Psychology, University of Toronto, Mississauga, Ontario, Canada.
Moraglia
G
G
D000328:Adult; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D008875:Middle Aged; D008962:Models, Theoretical; D009622:Noise; D010470:Perceptual Masking; D013028:Space Perception; D013236:Stereognosis; D015348:Vision, Binocular; D014794:Visual Fields