초록 ▼

A method and apparatus for reversibly transforming color, which is selected from a gamut of colors producible by the primaries of a color display device (20), into a perceptually uniform color space. The coordinates of the color space are readily convertible into internationally accepted standards f

A method and apparatus for reversibly transforming color, which is selected from a gamut of colors producible by the primaries of a color display device (20), into a perceptually uniform color space. The coordinates of the color space are readily convertible into internationally accepted standards for color measurement. Also provided, is a method for transforming the color space coordinates of a selected color into the corresponding relative primary intensity levels of the display device (20).

대표청구항 ▼

A method for defining an improved perceptually uniform color space for a display device, the improved perceptually uniform color space having coordinates H, V, and C, which are based upon CIELUV coordinates L*, v* and u*, the method comprising the steps of: (a) determining the maximum CIELUV chroma

A method for defining an improved perceptually uniform color space for a display device, the improved perceptually uniform color space having coordinates H, V, and C, which are based upon CIELUV coordinates L*, v* and u*, the method comprising the steps of: (a) determining the maximum CIELUV chroma C*uv=(u*2+v*2)½producible by a display device that has a plurality of color-producing primaries, the luminous intensity of the primaries being adjustable between minimum and maximum levels to produce a gamut of colors; (b) establishing a maximum numerical value for the C coordinate; (c) dividing the maximum C value by the determined maximum CIELUV chroma to yield a chroma factor Cf; and (d) defining the improved color space coordinates as: H=arctan (v*/u*)+K, where K=0°for u*>0 and v*>0; K=90°for u*0 and v*>0; K=180°for u*0 and v*0; K=270°for u*>0 and v*0; V=L*; C=C*uv(V)(Cf).