| 摘要 |
A high-speed saturation converter for a color image, comprising first R, G, and B image memories for storing digital color image data separated into R, G, and B, matrix coefficient calculating CPU for calculating two types of matrix coefficients alpha and beta defined by the following equation based on given saturation conversion coefficient a: alpha =1+2a, beta =1-a; a processor for calculating R, G, and B components r*, g*, and b* of an identical pixel when saturation conversion S*=aS is performed with respect to vector S, in an RGB color space, of saturation components corresponding to R, G, and B components of the identical pixel in the first R, G, and B image memories, in accordance with the following matrix equation defined when an intensity before and after the conversion is constant: <IMAGE> and second R, G, and B image memories for storing the R, G, and B components r*, g*, and b* calculated by the processor means in a position of the corresponding pixel.
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