COLOR CONVERSION APPARATUS, COLOR CONVERSION METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a technology capable of carrying out high speed color conversion in the case that values of adjacent pixels of an image like a natural image delicately differ from each other. SOLUTION: A color conversion apparatus includes: a pixel input section 10 for receiving an input pixel value; an index conversion section 20 for converting the input pixel value into an index signal; a delta conversion section 30 for converting the input pixel value into a delta signal; an input buffer 40 for storing the index signal and the delta signal; a conversion table storage section 50 for storing a conversion table wherein each interpolation coefficient is cross-referenced with each grating point of an input color space; a temporary storage section 60 for storing block tables obtained by dividing the conversion table; a control section 70 for acquiring the block table corresponding to the index signal when the block table exists in the temporary storage section 60 or acquires the block table from the conversion table storage section 50 when the block table does not exist in the section 60; an interpolation processing section 80 for obtaining an output pixel value from the interpolation coefficient stored in the block table and the delta signal; and a pixel output section 90 for outputting the output pixel value. COPYRIGHT: (C)2006,JPO&NCIPI