The invention provides a color image-processing apparatus in which there is provided a color reproduction table for producing plural color image signals for each of a plurality of processing channels in response to digital pixel signals splitted into said plurality of processing channels. There is further provided a signal processor for modifying a bit configuration of the digital pixel signals so that the bit configuration is differently modified corresponding to each of said plurality of processing channels. The produced plural color image signals are composed into one channel to form a new color image.