| 摘要 |
PROBLEM TO BE SOLVED: To correct the activity of developer again even when it is fluctuated by measuring the dot area rate or density of test dot pictures on a film and resetting the exposure of laser beams based on the measured dot area rate or density. SOLUTION: As the output signal of a measuring instrument 32, measured dot area rate data are supplied through a dot area rate data input part 17 to a halftone dot gradation correction part 22 as an output dot area rate So. At the correction part 22, designated dot area rate data Si are converted into corrected dot area rate data Sj and supplied to a dotting (binarizing) processing part 23. At the processing part 23, the data Sj are compared with threshold values consisting of a threshold value matrix and converted into binary image data. The binary image data are converted into the driving signal of an AOM 42 and supplied to the intensity modulation terminal of the AOM 42. The ON level of the driving signal is set by a laser power setting signal P outputted from a laser power setting part 25. Photosensitive materials K, on which dot pictures are recorded, are developed and fixed by an automatic developing machine 45. |
