| 摘要 |
PROBLEM TO BE SOLVED: To acquire conversion coefficients, which can more reduce calculation time and scarcely degrade color gradation property, in 3D LUT creation. SOLUTION: CMYK patches are printed and measured in a dCMYK patch printing/measurement processing part 106, and a 3D LUT 104 is created in an sRGB-dCMYK LUT creation processing part 105 using the measured data. In addition, each of L*a*b* entried to an initial 3D LUT is converted into sRGB based on the initial 3D LUT in an L*a*b*-sRGB conversion processing part 101, and then converted into dCMYK based on the 3D LUT 104 in an sRGB-dCMYK conversion processing part 102 to be printed and measured in the dCMYK. Subsequently, the sRGB is corrected until color blurring is eliminated, and a 3D LUT 108 is synthesized in a 3D LUT synthetic processing part 107 from the finally acquired 3D LUT 103 and 104. COPYRIGHT: (C)2006,JPO&NCIPI
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