| 摘要 |
PURPOSE:To read a picture usually and stably and to discriminate a specific picture with simple configuration. CONSTITUTION:The copying machine reading only the printed pattern and recognizing it for the forgery prevention processing when an object picture with a specific pattern printed thereon in a colorless transparent infrared fluorescent paint is read by a copying machine side, only the printed pattern is read implements the recognition sequence recognizing the pattern and the read sequence for original copying separately. In the recognition sequence, a filter 612 cutting off the visual light other than the fluorescent light is inserted to the optical system and in the read sequence, the filter 611 cutting off a harmful light other than the visual light is inserted to the optical system through the control (drive system 616), then the recognition sequence and the read sequence by the same read sensor and the same lighting source are obtained. |
