Image processing method, image processing apparatus and image processing program

摘要

A image processing apparatus that adjusts an input color image in natural color and performs the color adjustment at high speed according to the desires of the operator and within an arbitrary adjustment range, and comprises: a chromaticity value curve selection unit that sets a target chromaticity value surface inside a three-dimensional space expressed by one lightness value and two chromaticity values, and selects a target chromaticity value curve on the surface; a target chromaticity value display unit that displays the curve; a target chromaticity value generation unit that uses the curve to find target chromaticity values according to the input lightness value of an input color image signal; a color adjustment coefficient generation unit that generates a color adjustment coefficient from the target chromaticity value; and a color adjustment unit that uses the coefficient to bring the input chromaticity values close to the target chromaticity values.