Patent ID: 7728881
Filing Date: 2010-06-01
Classification: H04N

Abstract:
1. A color signal correcting method for correcting a color signal of each pixel outputted from a single-plate color image pickup element having a given color filter arrangement before synchronization of interpolating spatial displacements of color signals, which are inherent in the color filter arrangement of single-plate image pickup elements, to generate RGB color signals at each pixel location to correct a color reproduction error in an image, comprising the steps of: computing color signals of filter colors other than a filter color at the spatial location of a pixel to be corrected, wherein the other color signals at the spatial location are computed on the basis of color signals of a plurality of pixels of the same filter color located around the pixel to be corrected; and obtaining a correction value by multiplying the color signal of the pixel to be corrected and the computed other color signals by a predetermined correction coefficient and combining the products; wherein the other color signals at the spatial location are computed by computing the average value of color signals of a plurality of pixels of the same filter color located on the smallest concentric circle around the pixel to be corrected; wherein the step of computing color signals of filter colors other than a filter color at the spatial location of a pixel to be corrected, and the step of obtaining a correction value, produce gain-corrected dot sequential RGB color signals prior to color interpolation to generate one RGB per pixel.