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Color correction with a lookup table

  • US 10,462,439 B2
  • Filed: 10/03/2016
  • Issued: 10/29/2019
  • Est. Priority Date: 10/02/2015
  • Status: Active Grant
First Claim
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1. A method for processing video content, the method comprising:

  • receiving a first luma sample, a first chroma sample, and a two-dimensional (2D) look-up table (LUT) for producing corrected chroma values, wherein the 2D LUT defines a luma dimension and a chroma dimension associated with a 2D color space of the video content, the 2D color space is defined by a plurality of rectangular units with respective vertices, and the 2D LUT comprises corrected chroma component values associated with the respective vertices of the rectangular units;

    determining an input luma value and an input chroma value to the 2D LUT via an upsampling operation utilizing at least one of the first luma sample or the first chroma sample, wherein the first luma sample and the first chroma sample are associated with different sampling locations, and the input luma value and the input chroma value are aligned to a same sampling location;

    producing an output chroma value based on the 2D LUT, the input chroma value and the input luma value; and

    reconstructing the video content using at least the output chroma value.

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