| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent an erroneous identification caused by noise of read image data or the like, to simplify arithmetic processes and an arithmetic circuit at the same time, and to shorten the processing time and reduce the production cost of an original image identification apparatus. <P>SOLUTION: In a chromaticity acquisition part 21 by blocks, a chromaticity value a<SP>*</SP><SB>BLK</SB>-b<SP>*</SP><SB>BLK</SB>by blocks resulting from averaging a chromaticity value a<SP>*</SP><SB>XY</SB>-b<SP>*</SP><SB>XY</SB>which is generated for the unit of a pixel by original image reading and required color space conversion processing for a predetermined block unit, is acquired and in a saturation acquisition part 22 by blocks, saturation information C<SP>*</SP><SB>BLK</SB><SP>2</SP>for the unit of a block is acquired from the chromaticity value a<SP>*</SP><SB>BLK</SB>-b<SP>*</SP><SB>BLK</SB>by blocks. In a monochromatic/chromatic judging part 23, it is judged on the basis of the saturation information C<SP>*</SP><SB>BLK</SB><SP>2</SP>for the unit of a block, whether an original image is monochromatic or is chromatic. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
