| 摘要 |
PROBLEM TO BE SOLVED: To find an optimum color correction matrix coefficient for an arbitrary color image signal and to attain excellent color reproduction even for an image photographed in any light source environment. SOLUTION: Optimum color correction matrix coefficients corresponding to a plurality of previously set reference light sources are stored, a lighting source at the time of photography which is detected is used for an inputted color image signal, and interpolation operation is performed for a stored color correction matrix coefficient to calculate a color correction matrix coefficient for the color image signal. For a track of a plurality of reference light sources in a designated color space, the shortest distance point on the track from the position of the detected lighting source in the color space is found. Based upon the position of the found point on the track and positions of two reference light sources disposed across the point, stored optimum color correction matrix coefficients are interpolated to calculate a color correction matrix for the inputted color image signal. COPYRIGHT: (C)2006,JPO&NCIPI
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