Image processing apparatus and method

摘要

Image processing apparatus and method converts an image in a predetermined input system to an image corresponding to a colour gamut obtained by a predetermined output system. In the image processing apparatus and method a CPU (21) converts signals in a colour space which does not depend on a device to signals CMY (consisting of cyan (C), magenta (M) and yellow (Y)) corresponding, for example, to a printer (3) by referring to a lookup table, and outputs the signals to the printer (3) via an interface. On the lookup table stored in a ROM (22) there are registered the values of signals CMY corresponding to the values of signals L*a*b*. The values of signals CMY within a gamut in which the value DELTA E of a colour-difference formula is minimised are used as the values of the signals CMY corresponding to the signals L*a*b*, which are mapped outside the gamut of the signals CMY. <IMAGE>