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Encoding, decoding, and representing high dynamic range images

  • US 10,264,259 B2
  • Filed: 06/18/2018
  • Issued: 04/16/2019
  • Est. Priority Date: 04/15/2011
  • Status: Active Grant
First Claim
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1. A non-transitory processor readable medium having stored thereon an image structure for representing a high dynamic range image in a compressed format to be decoded by a decoder, the image structure comprising:

  • a compressed tone-mapped image;

    a marker indicating the presence of high dynamic range (HDR) reconstruction data to reconstruct a high-dynamic range image based on the compressed tone-mapped image; and

    the high dynamic range (HDR) reconstruction data, wherein the HDR reconstruction data comprise;

    a luma ratio image comprising quantized luminance ratio pixel values;

    luma de-quantization parameters for the quantized luminance ratio pixel values;

    one or more sets of quantized residual chroma values; and

    chroma de-quantization parameters for the one or more sets of quantized residual chroma values.

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