Threshold Contrast
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Threshold Contrast
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The smallest contrast of luminance (or
brightness) that is perceptible to the human eye under specified conditions of
adaptation
luminance and target visual angle. Also called contrast threshold,
liminal contrast. Compare threshold
illuminance. Psychophysically, the existence of a threshold contrast is
merely a special case of the general rule that for every sensory process there
is a corresponding lowest detectable intensity of stimulus, i.e., a limen. [[/a>|/a>
]]
References
This article is based on NASA's Dictionary of Technical Terms for Aerospace Use