CONTRAST
Contrast is a function of differences in intensity between the darkest and the brightest areas of a picture. When contrast is high the picture contains sharp blacks and whites. When low, the picture shows only variations in gray tones. Excessive contrast can result from improper illumination or photographing in harsh sunlight. In such a case, it can be corrected using a video processor. In the same fashion, a low contrast image, which is the result of insufficient illumination, can be enhanced. Very few video processors on the market today offer real contrast control.
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