| 摘要 |
PROBLEM TO BE SOLVED: To easily judge a defective block in an image processing system board without a cost. SOLUTION: An image processing part 2 is provided with a θ-correction block 21, a color correction block 22, an editing block 23, a filter and gradation block 211, a printer θ-correction block 25 and a selector 26. The selector 26 outputs correction data which is supplied from the printer γ-correction block 25 to a writing part 3 at the time of normal printing. In the meantime, input data of the γ-correction block 21 and output image data of the respective blocks 21-24 are supplied to the selector 26. When the hard-check of the image processing part 2 is executed, the selector 26 outputs image data of an instruction block by changing-over supplied respective kinds of image data. Thus, image data from the instruction block is recognized by a copy. |
