Patent
1996-03-28
1997-03-11
Jankus, Almis R.
395326, G06T 500
Patent
active
056110308
ABSTRACT:
A method is provided for use in a color computer graphics system whereby mapping constraints are relaxed and redefined so as to allow out-of-gamut colors to be mapped to in-gamut colors in a manner that is significantly more visually pleasing than in conventional methods. More particularly, the present invention provides a method of mapping source device colors to destination device colors in a computer graphics system having a color image source device and a color image destination device having non-coincident color gamuts such that a plurality of colors within a color gamut of the source device are out of gamut colors outside a color gamut of the destination device. A color name is associated with an out-of-gamut color, which is mapped to a first in-gamut color within the color gamut of the destination device. A color name is also assiciated with the first in-gamut color. If the color name associated with the out-of-gamut color and the color name associated with the first in-gamut color are different, the out-of-gamut color is remapped to a different in-gamut color within the color gamut of the destination device. The color name associated with the out-of-gamut color and the color name associated with the first in-gamut color are based on psychophysical experimentation, i.e., are indicative of what an average user is likely to call the color in question. The remapping may be single-step or iterative.
REFERENCES:
patent: 5018085 (1991-05-01), Smith, Jr.
Boynton, Robert M., A System of Photometry and Colorimetry Based on Cone Excitations, Color, 11, 4:244-252 (1986).
Boynton, Robert M., et al., Categorical Color Rendering of Four Common Light Sources, Color, 15, 4:222-230 (1990).
Boynton, Robert M., et al., Category Effectes in Color Memory, Color, 14, 5:229-234 (1989).
Boynton, Robert M., et al., Centroids of Color Categories Compared by Two Methods, Color, 14, 1:6-15 (1989).
MacLeod, Donald I. A., et al., Remarks on the Constant Luminance Chromaticity Diagram, Color, 14, 3:157-158 (1989).
Shinoda, Hiroyuki, et al., Categorized Color Space on CRT in the Aperture and the Surface Color Mode, Color, 18, 5:326-333 (1993).
Apple Computer Inc.
Jankus Almis R.
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