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HDR images with multiple color gamuts

  • US 9,374,589 B2
  • Filed: 05/12/2015
  • Issued: 06/21/2016
  • Est. Priority Date: 08/08/2012
  • Status: Active Grant
First Claim
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1. A method to encode with a processor a high dynamic range (HDR) image, the method comprising:

  • receiving an input HDR image (HDR) with an input color gamut and an input dynamic range;

    applying a tone mapping and a gamut mapping function to the input HDR image to generate a first base image in a first dynamic range and a first color space, wherein the first color space comprises a first color gamut, wherein the first dynamic range is lower than the input dynamic range and the first color gamut is narrower than the input color gamut;

    applying a color transform process to the first base image to generate a second base image in a second color space with a second color gamut, wherein the second color gamut is different than the first color gamut;

    generating HDR metadata in response to the input HDR image and the second base image; and

    generating an output coded HDR image based on the first base image and the HDR metadata.

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