Global Display Management Based Light Modulation

摘要

A plurality of input images in an input video signal of a wide dynamic range is received. A specific setting of global light modulation is determined based on a specific input image in the plurality of input images. The specific setting of global light modulation produces a specific dynamic range window. A plurality of input code values in the specific input image is converted to a plurality of output code values in a specific output image corresponding to the specific input image. The plurality of output code values produces the same or substantially the same luminance levels as represented by the plurality of input code values. Any other pixels in the specific input image are converted to different luminance levels in the specific output image through display management.

主权项

1. A method, comprising:
receiving a plurality of input images in an input video signal of a wide dynamic range; 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 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 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.