| 摘要 |
When there is a copy inhibiting dot pattern in an image, an image destruction processing unit performs image destruction processing to image data, and a storage processing unit stores in a storage unit the image data after the image destruction processing. An RGB/CMY conversion processing unit converts the image data into CMY image data C1, M1, Y1, and a UCR/black creation processing unit sets coefficient α of Formula “K1=min (C1, M1, Y1)×α” to “1,” and creates image data K1, C2, M2, Y2 by using Formula “C2=C1−K1, M2=M1−K1, Y2=Y1−K1.”
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