PROBLEM TO BE SOLVED: To provide an image copying machine that reduces degradation in image quality in generation copies and relieves the load of a user when generation copies are made. SOLUTION: A detection section 61 compares each specific pattern stored in advance in a ROM 63 with an a* signal outputted from a 1st color control section 24 to detect a specific pattern. A control section 62 stores a specific pattern detection position in a specific pattern coordinate storage section 65, reads a corresponding parameter from the ROM 63 and stores it in a RAM 64. After processing in a 2nd color conversion section 25 according to the control parameter in the RAM 64, a pattern elimination section 66 eliminates the specific pattern in the image, and the resulting image is processed by a black generation processing section 26, a precision processing section 27 according to the control parameter in the RAM 64, and a recording system gamma correction section 28. Furthermore, a pattern addition section 67 adds a new specific pattern to a yellow signal and an image forming section 3 forms an image.

Image copying machine

PROBLEM TO BE SOLVED: To attain optimum color correction by discriminating whether or not an object original is an original (generation original) outputted from an electrophotographic color copying machine with high accuracy and selecting a color correction means accordingly when the generation original is discriminated. SOLUTION: An original discrimination circuit 5 discriminates whether or not an original is a generation original at preliminary scanning. When the original is discriminated as the generation original, a coefficient for the generation original is selected from a color correction coefficient storage section 6 at main scanning and set to a color correction circuit 3 to apply optimum color correction processing to the original.

Color image processor and output original discrimination device

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Color image processor and output original discrimination device