To obtain an excellent image by correcting color reproduction ranges between input/output devices, such as a color printer, which have the different color reproduction ranges.
For an arbitrary reproduced color P of an input device (CRT) outside the color reproduction range of an output device (printer), a saturation approximate point S and a luminance approximate point L are found within a specific hue range including the reproduced color P, the internally dividing point where points L and S are internally divided is found by weighting by the ratio of the distance L-P between the luminance approximate point L and reproduced color P and the distance S-P between the saturation approximate point S and reproduced color P or the ratio of the squares, and the point C of the outermost outline of the color reproduction range of the output device closest to the internally dividing point is regarded as a color reproduction correction value C of the corresponding output device for the reproduced color P of an input device. Consequently, the color reproduction ranges are corrected between the input and output devices corresponding to the shape of the color reproduction ranges on an arbitrary hue.
TANAKA TAKEHISA
NICHOGI MUTSUKO
IIDA HIDENOBU
AOKI KATSUJI
KANAMORI KATSUHIRO
Next Patent: COLOR CORRECTING DEVICE