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Encoding, Decoding, and Representing High Dynamic Range Images

  • US 20130071022A1
  • Filed: 11/13/2012
  • Published: 03/21/2013
  • Est. Priority Date: 04/15/2011
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • receiving a high dynamic range (HDR) image;

    generating a tone-mapped (TM) image based on the HDR image;

    generating a luminance ratio image, the luminance ratio image comprising luminance ratio values generated by dividing luminance values of the HDR image with luminance values of the TM image;

    applying the luminance ratio values to the HDR image to create a re-mapped image;

    determining residual chroma values based on the re-mapped image and the TM image;

    generating a log ratio image based on the luminance ratio image; and

    generating a coded HDR image, the coded HDR image comprising the TM image and HDR reconstruction data, the HDR reconstruction data being derived from the log ratio image and the residual color values.

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