| 摘要 |
PURPOSE:To inexpensively provide a digital copying machine provided with the security function of a copying machine or the copying prohibition function of confidential documents. CONSTITUTION:When a red image detection signal is outputted to a main control unit 320 when a recognition unit 350 investigates the white/red image data stored in a memory unit 340 and detects red image data after an original is optically read by a scanner 100, white/black image data and white/red image data are obtained by performing a photoelectric conversion for it by a CCD image sensor 110 and they are stored in memory units 330, 340, a main control unit 320 performs the control of stopping the copying operation of a laser printer 200 performing the image forming of white/black images on transfer paper in accordance with the white/balck output image data. |
