| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that, when creating a copy image by photographing a original drawing by a digital camera and outputting the photographed original drawing by a printer, illumination nonuniformity may occur in an observation light source photographic image in comparison with a flash photographic image to which the fixed quantity of light is radiated, and high-precision color conversion cannot be calculated. SOLUTION: In an image processing method, first of all, pixels indicating the same colors are selected from a plurality of positions in a flash photographic image. Next, positions of corresponding pixels are selected from an observation light source photographic image. When colors at the pixel positions are different, there is an influence of the illumination nonuniformity of an observation light source. Therefore, shading correction data for the observation light source photographic image are created. Furthermore, the shading correction data are used to remove the shading of the observation light source photographic image. COPYRIGHT: (C)2011,JPO&INPIT
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