The present invention relates to a video display device such as a TV receiver or a image processing apparatus such as a set-top box including a DVD player or a digital tuner, and more particularly to an image processing apparatus with a configuration in which the luminance distribution of an input video signal is detected for correcting the image quality.
A prior art technology for improving the contrast effect of a video displayed on a display device is disclosed, for example, in JP-A-2002-359754. The disclosed technology detects a luminance histogram from the input video signal and corrects the minimum value of the video signal according to the distribution amount of the minimum interval range in the luminance histogram for adjusting the gray scale near the black.