Property modeling for real time human being visual system
A performance, normalization technique, used in television, image analysis, instrumentation, etc., to solve problems such as lack of instantaneous effects of spatial frequency sensitivity, model adoption, and obvious complexity
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[0036] When examining the performance of the human visual system revealed by data from the literature in conjunction with historical data on the effects of various noise sources on the human visual system, the following observations can be made:
[0037]1. In the higher spatial frequency range, the amplitude sensitivity in the linear region of the influence of brightness on the contrast sensitivity function is insensitive to the changing average brightness, but decreases according to the square of the frequency. This corresponds to a second order low pass filter.
[0038] 2. Weber and Devries-Rose areas [see Taylor et al., "Contrast Detection and Discrimmation for Visual Models" and N. Gray Graham, and "Visual pattern Analyzers", Oxford U. press 1989] both correspond to the low frequency range where amplitude sensitivity is most affected by varying average luminance. Examination of the amplitude versus frequency plots at various mean luminances reveals behavior similar to a v...
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