Patent ID: 7826680

Claim:
A method of adaptive contrast control, comprising: (a) receiving a video frame formed of a plurality of pixels each having associated pixel data; (b) generating an integrated luminance histogram for the received video frame data; (c) generating histogram difference values in accordance with histogram values from the integrated histogram and histogram values from a flat histogram; (d) multiplying the histogram difference values by a strength factor SF and adding resulting values to the histogram values of the flat histogram to generate conditioned histogram values; (e) scaling and limiting the conditioned histogram values resulting from step (d); (f) generating a transfer function in accordance with values resulting from step (e); (g) updating the video frame data using the transfer function to enhance contrast of the video frame; (h) providing the updated video frame to a display; and (i) when a next video frame is received, repeating steps (a) through (f) for the next received video frame.