For the chroma-from-luma intra-prediction mode of the free video compression format AV1, scaling factors ranging from -2 to 2 are chosen by a rate-constraint search and signaled to the decoder to set the color tone. The x-axis shows varying factors for the C<sub>b</sub> plane, the y-axis for the C<sub>r</sub> plane.
Luc N. Trudeau, Nathan E. Egge, David Barr (Mozilla/Xiph.Org Foundation)
CC BY 4.0
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