| 摘要 |
PURPOSE:To eliminate the deterioration in picture quality by binary-coding other chrominance component signal by a prescribed threshold signal and recording it when a chrominance signal of one color separation picture signal is decided as high resolution. CONSTITUTION:The color separation signal resulted from reading of an original from an input device 101 is converted for the complementary color and then A/D-converted and inputted to binary-coding circuits 104Y, 104M and 104C and area identifying circuits 108Y, 108M and 108C, respectively. As the result of identification of the recognizing circuit 108, when an OR circuit 109 judge that the inside of any inside of a noted picture element block of an original is a high resolution region, the picture element data are compared by a single picture element matrix table 105 as to all chrominance components. When all three color signals, Y, M and C are judged to be in a contrast picture region, the binary-coding is processed by a dither matrix table memory 106. Thus, the deterioration in the picture quality due to the overlap of the single threshold processing and the dither processing at each chrominance component is prevented. |
