| 摘要 |
PURPOSE:To judge automatically a degree of displacement between a picture image and copying paper by only printing a test pattern, and permitting the outputted copy to be read therein. CONSTITUTION:In a white/black correction circuit 15, the output dispersion of CCD such as light distribution ununiformity and picture image dispersion are corrected to be a constant value, The output D2 is inputted in a cut-out circuit 16, and the size of document being currently read therein from CPU 19 is informed to cut out only document area from the data D2 and then accommodated in a memory 17 as a picture image data D3. The picture image data D3 is sent intactly from the memory 17 to a laser control 20 so as to control a laser diode 21 according to the picture image data and then shoot the image on a drum 23. A laser beam position detector 22 is to recognize the standard position of the laser beam, and the CPU 19 serves to monitor this for controlling the laser timing of shoot it onto the drum 23. |
