Method and apparatus for encoding color mapping information and processing pictures based on color mapping information
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United States of America Patent
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Oct 13, 2020
Grant Date -
Feb 1, 2018
app pub date -
Feb 19, 2016
filing date -
Feb 20, 2015
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Abstract
Color mapping information can be used to transform one color to another color. The present embodiments provide a solution for representing the color mapping information using a successive application of multiple color mapping functions. Parameters for the multiple color mapping functions can be encoded into a bitstream. In one embodiment, color mapping functions are consecutively applied on their own domains of definition only. In another embodiment, the first color mapping (CRI1) is applied on its domain of definition only, but the second color mapping is applied only on samples that have been previously color mapped by CRI1 and which are also inside the domain of definition of the second color mapping function. At the decode side, the multiple color mapping functions can be reconstructed and successively applied to a decoded picture to generate another picture.
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