Patent ID: 7218344
Filing Date: 2007-05-15
Classification: H04N

Abstract:
1. A system for efficiently performing a white balancing operation, comprising: an imaging device configured to provide captured image data corresponding to a photographic image; and a color manager configured to convert said captured image data into perceptual color space data, said color manager creating a histogram of chromaticity vectors corresponding to said perceptual color space data, said color manager next deriving a neutral core vector corresponding to a neutral core peak from said histogram, said color manager utilizing said neutral core vector to identify a scene illuminant corresponding to color channel amplifier gains, said color manager then adjusting said captured image data with said color channel amplifier gains to thereby complete said white balancing operation, said color manager removing RGB pixels with a red value less than 15, and a green value less than 15, and a blue (B) value less than 15 from said captured image data, said color manager saving a minimum luminance (minL*) and a maximum luminance (maxL*) count for theta bins from said histogram for subsequently calculating a luminance range value for each of said theta bins.