| 摘要 |
PURPOSE:To exactly discriminate a linear picture and a tonal pitcture, by processing an output signal of a photoelectric converting element corresponding to the quantity of light at each scanning point, which is made incident through an image pickup lens to the pohotodetecting surface, and discriminating a kind of an original picture. CONSTITUTION:An optical information signal So inputted to a sensor 271 passes through a sampling circuit 272 and an A/D converter 273, and is counted up at every constant desity section, once at every main scanning or extending over the prescribed number of sub-scanning, and at every constant density section or extending over the prescribed number of sub-sccanning, and is prepared for a histogram. |
