Although the effect of brightness emanating from an object depends primarily on its Luminance, luminance cannot be treated as an absolute measure for the perception of brightness. Given different levels of surrounding brightness, surfaces of identical luminance can in fact lead to varying subjective assessments of brightness. Luminance is a quantifiable physical value, whereas brightness is an expression of a subjective response. For photopic vision, brightness is roughly proportional to the logarithm of luminance.
Modified on: Mon, 20 Jun, 2016 at 9:58 AM
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