Example of correlation of the chroma planes with the luma plane and its exploitation for image compression.
A 32-by-32 pixel block of raster image data is shown next to a plot of its Cb (red) and Cr (blue) sample values over their corresponding luma values. Two straight lines represent the correlation model as coded by the free video compression format AV1 for its chroma-from-luma intra-prediction mode.
Luc N. Trudeau, Nathan E. Egge, David Barr (Mozilla/Xiph.Org Foundation)
CC BY 4.0
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