Patent ID: 7894000
Filing Date: 2011-02-22
Classification: G06T,H04N,H05B,Y02B

Abstract:
1. A method for dominant color extraction from video content encoded in a rendered color space (RGB) to produce, using perceptual rules, a dominant color (DC) for emulation by an ambient light source ( 88 ), comprising: [1] Performing dominant color extraction from pixel chromaticities (Cp) from said video content in said rendered color space to produce a dominant color by extracting any of: [a] a mode of said pixel chromaticities; [b] a median of said pixel chromaticities; [c] a weighted average by chromaticity of said pixel chromaticities; [d] a weighted average of said pixel chromaticities using a pixel weighting function (W) that is a function of any of pixel position (i, j), chromaticity (x, y, R), and luminance (L); [2] Further deriving the chromaticity of said dominant color in accordance with a perceptual rule, said perceptual rule chosen from any of: [a] a simple chromaticity transform (SCT); [b] a weighted average using said pixel weighting function (PF [3] Transforming said dominant color from said rendered color space to a second rendered color space (R′G′B′) so formed as to allow driving said ambient light source.