Patent ID: 6904167

Claim:
A color conversion device comprising: calculating means for calculating maximum and minimum values β and α of image information for each pixel; hue data calculating means for calculating hue data r, g, b, y, m and c based on the image information, and the maximum and minimum values β and α outputted from said calculating means; means for generating comparison-result data based on said hue data outputted from said hue data calculating means; first calculating means for performing calculation on outputs from said comparison-result data generating means and said hue data outputted from said hue data calculating means; second calculating means for performing calculation on said hue data outputted from said hue data calculating means; coefficient generating means for generating predetermined matrix coefficients; and means for performing matrix calculation using the comparison-result data from said comparison-result data generating means, outputs from said first and second calculating means, the hue data from said hue data calculating means, the minimum value α from said calculating means and the coefficients from said coefficient generating means, to thereby obtain color-converted image information.