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Contrast, brightness, CONTRAST, and BRIGHTNESS
User-accessible controls labelled CONTRAST and BRIGHTNESS are found on nearly all electronic displays. These labels are indirectly and confusingly connected to the perceptual attributes brightness and contrast. In a CRT, adjusting BRIGHTNESS upwards from its optimum setting affects visual contrast much more than a comparable adjustment of the CONTRAST control. Adjusting CONTRAST affects visual brightness much more than a comparable adjustment of the BRIGHTNESS control. BRIGHTNESS and CONTRAST are therefore misleading labels. Today, CONTRAST and BRIGHTNESS controls are implemented in literally billions of pieces of equipment. Hundreds of millions of people have a poor understanding of these controls, ...
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