Abstract

Using the method of predicting the discrimination probability of visual stimuli and the objects of actual scenes, an analysis is carried out of the threshold luminance difference ΔL_min, proposed by Narisada as an estimate of visual processability in the range of adaptation luminance -1.0 ≤ log L_a ≤ 3.0. The numerical values of contrast K_min=ΔL_min/L_a substantially differ from the threshold contrasts obtained in Blackwell's experiments and those calculated by us for the same conditions of visual perception. The results of the analysis give a basis for assuming that the proposed value of ΔL_min needs to be refined. It is shown that the probability of discriminating the stimulus (the object) can be used as an estimate of the visual processability.

© 2007 Optical Society of America

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