均等色差空間の開発
CIELABクロマスケールの修正
2003 年 87 巻 11 号 p. 912-918
詳細
2003 年 87 巻 11 号 p. 912-918
An improvement in the CIELAB toward uniformity in color-difference space is presented. Munsell Hue circles at intervals of two Chroma units from Chroma/2 to/20 for Values 9/to 1/in the CIELAB are not uniform. The basic idea is to modify an equal color difference between the adjacent Munsell Hue lines or Chroma lines. A new chroma-difference scale has been developed that conforms better with the Munsell chroma spacing than the CIELAB does. The center is corrected by mass of the Chroma/2 curves, because of an abnormal displacement of the achromatic point in the Munsell system. The color adaptation effect with illuminance causes the displacement of the achromatic point.
