Color image processing apparatus having exact color reproduction capability

摘要

An image processing apparatus is for exactly reproducing color originals. The apparatus includes a circuit for removing a ground color contained in an input color signal by forcibly changing an input signal having a level larger than a predetermined level to white. The apparatus may include a gamma correction circuit having therein a plurality of selectable gamma collection data. The apparatus may also include a circuit for producing a natural monochromatic signal from signals corresponding to three primary color signals R, G and B by performing an operation expressed as [(signal corresponding to R)x2I+(signal corresponding to G)x2I+(signal corresponding to B)x2K]/2L wherein I, J, K and L are integers and 2I+2J+2K=2L.