JPS6472662A - Color picture processor - Google Patents

Abstract

PURPOSE:To improve the reproducibility of a black character by stopping the output of yellow, magenta and cyanogen toners and outputting only black toner when an original is of an achromatic color and of a character area. CONSTITUTION:Actions such as exposure, development and transfer are repeated four times at every reading scanning of the original, and the toner pictures of four colors such as yellow, magenta, cyanogen and black are all transferred to a transfer paper P. That is, a yellow toner picture is formed on a photosensitive body 8 is synchronization with a first original scanning, and it is transferred on the transfer paper P, and in the same way, the toner picture is formed and transferred for the respective colors of the magenta, cyanogen and black. In a copying machine system without a memory to store the original information for one portion, the picture area of the character area and achromatic color, namely of the black character, is detected at every reading scanning, and at the time of developing the yellow, magenta, cyanogen and black, the signal to output the black instead of the yellow, magenta and cyanogen is outputted as the modulated signal of laser light. Thus, the reproducibility of the black character is improved.