Patent ID: 6766064
Filing Date: 2004-07-20
Classification: G06T

Abstract:
A method of compressing an intensity dynamic range of an input image to a reduced intensity dynamic range of an image display signal, comprising:a) defining plural units of each frame of the input image, each input image unit having a corresponding intensity; b) determining a local mean estimate of the intensity of each of the plural units of the input image; c) processing each local mean estimate, separately and directly, in accordance with: i) a mean modification function to produce a corresponding mean modification processing result, and ii) a contrast function, comprising a contrast modification function, to produce a corresponding contrast modification processing result, wherein the contrast function further multiplies an output of the contrast modification function by a contrast estimate to produce the contrast modification processing result; and d) combining the corresponding mean modification function result and contrast modification function result to produce, for each input image unit intensity, a respective output intensity, within the reduced intensity range, for a corresponding unit of the image display signal.