Patent ID: 9654701
Date: 2017-05-16
CPC Classifications: G06T,G09G,H04N

Claim:
1. A method, comprising: receiving a plurality of input images in an input video signal of a wide dynamic range, the specific input image is perceptually quantized with input code values independent of a display system based on a nonlinearity of human vision; determining, based on a specific input image in the plurality of input images, a specific setting of global light modulation for each color channel, the specific setting of global light modulation producing a specific dynamic range window, an output luminance level range represented by the specific dynamic range window being a proper subset of a luminance level range represented by the wide dynamic range; converting a plurality of input code values in the specific input image to a plurality of output code values in a specific output image corresponding to the specific input image for the specific setting of global light modulation for a first color channel, the plurality of output code values producing perceptually the same or substantially the same luminance levels as represented by the plurality of input code values, and the plurality of output code values being within the specific dynamic range window; and converting one or more remaining input code values in the specific input image to one or more output code values in the specific output image for the specific setting of global light modulation for the first color channel, the one or more output code values producing perceptually different luminance levels as represented by the one or more input code values, and the one or more output code values being within the specific dynamic range window.