IMAGE PICKUP DEVICE

摘要

A gradation compensation circuit for gradation compensating the luminance level of the image signal is disclosed. An image evaluation means 108 evaluates the amount of backlighting and normal lighting in the overall image, and defines the degree of gradation compensation to be applied by the gradation compensation circuit according to the result of image evaluation. An AGC circuit maintains the overall luminance of the image constant. When the AGC control signal applied to the AGC circuit is high, the degree of compensation is suppressed, but when the AGC control signal is low, the degree of compensation is used without being suppressed. <IMAGE>