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What are “suprathresholds” and “thresholds,” with reference to color difference?

April 26, 2017color Reference thresholds

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What are “suprathresholds” and “thresholds,” with reference to color difference?

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“Suprathreshold” refers to stimuli that are clearly visible. In the case of color differences, it would refer to a pair of stimuli in which the difference was clearly perceptible. “Threshold” on the other hand refers to color differences that are just barely perceptible. The magnitude of a color-difference threshold depends on details of the viewing conditions, stimulus configuration, and color in question.