Contrast 2
Contrast 2 : Range of difference between light and dark values in an image. Usually expressed as a contrast ratio, i.e., the ratio between the higher object transmittance or background transmittance to the lower of object transmittance or background transmittance. NOTE: Contrast - (B1 - B2) / B1 (100) where: B is the brightness; B1 is the brighter of two contrasting fields; B2 is the darker of two contrasting fields. (R15.02)
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