Color transformation in 3D color space

Details Color transformation in 3D color space Color transformation in 3D color space

2005-08-16

2005-08-16

Tung, Kee M. (Department: 2676)

Computer graphics processing and selective visual display system

Computer graphics processing

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Reexamination Certificate

active

06930691

ABSTRACT:
A method, system and computer readable medium for transforming three dimensional (3D) color information into a color standard is described. A 3D cube defined by eight RGB color points representing the eight vertices of the 3D cube is stored. Each of the eight points represents one of the colors: red, yellow, white, magenta, blue, black, green and cyan. In addition, each of the eight points represents the difference between the capacity of a display and the color standard. The 3D cube is divided into six tetrahedrons and the tetrahedron corresponding to an input RGB pixel is selected. A 3×3 matrix based on the vertices of the selected tetrahedron is calculated. The 3×3 matrix is then multiplied by the components of the input RGB pixel to produce an output RGB pixel conforming to the color standard.

REFERENCES:
patent: 5428465 (1995-06-01), Kanamori et al.
Sugiura, H., Kagawa, S., Takahashi, M., and Matoba, N., “Development of New Color Conversion System,” pp. 278-289, Proceedings of SPIE vol. 4300 (2001).
Chosson, S.M., and Hersch, R.D., “Visually-Based Color Space Tetrahedrizations for Printing With Custom Inks,” pp. 81-91, Proceedings of SPIE vol. 4300 (2001).

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