Dominant color extraction using perceptual rules to produce ambient light derived from video content
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United States of America Patent
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Feb 22, 2011
Grant Date -
Oct 18, 2007
app pub date -
Jun 27, 2005
filing date -
Jun 30, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Extracting and processing video content encoded in a rendered color space to be emulated by an ambient light source, using perceptual rules for intelligent dominant color selection. Steps include quantizing the video color space; performing dominant color extraction by using a mode, median, mean, or weighted average of pixel chromaticities; applying perceptual rules to further derive dominant chromaticities via [1] chromaticity transforms; [2] a weighted average using a pixel weighting function influenced by scene content; and [3] extended dominant color extraction where pixel weighting is reduced for majority pixels; and [4] transforming the dominant color chosen to the ambient light color space using tristimulus matrices. A color of interest can be further analyzed to produce a true dominant color, and past video frames can guide selection of dominant colors in future frames.
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