| 摘要 |
Color is edited using a color representation including digital values B (brightness), e and f such that B=√{square root over (D<SUP>2</SUP>+E<SUP>2</SUP>+F<SUP>2</SUP>)}, e=E/B, f=F/B, where DEF is a linear color coordinate system. Alternatively, color is represented using digital values B, C (chroma) and H (hue), where cos C=D/B and tan H=E/F. Color-to-monochromatic image conversion, or changing the color of a monochromatic image, can be accomplished by setting e and f to constant values, and possibly (not necessarily) leaving B unchanged. Alternatively, the conversion can be accomplished by setting C and H to constant values. Other features are also provided.
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