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Method and device for encoding a HDR picture

  • US 10,462,492 B2
  • Filed: 11/16/2016
  • Issued: 10/29/2019
  • Est. Priority Date: 11/16/2015
  • Status: Active Grant
First Claim
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1. A method for coding a HDR picture comprising:

  • mapping the HDR picture to obtain a SDR picture;

    determining color correcting parameters;

    color correcting said SDR picture responsive to said color correcting parameters;

    encoding the color corrected SDR picture and the color correcting parameters in a backward compatible stream, so that a corresponding HDR picture can be generated from the SDR picture and the color correcting parameters;

    wherein the method operates in a YCbCr color space; and

    wherein determining color correcting parameters comprises;

    determining color correcting parameters comprises;

    determining an intermediate reference SDR picture so that luminance of the intermediate picture is equal to luminance values of the obtained SDR picture and hue is preserved between said HDR picture and said intermediate reference SDR picture;

    determining the color correcting parameters for Cb and Cr components from said intermediate reference SDR picture and from said obtained SDR picture.

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