[54] DISPLAY-BASED COLOR SYSTEM
[75] Inventors: Joann M. Taylor, Beaverton; Paul A.
McManus, Sherwood; Gerald M.
Murch, Portland; Roxanna F. Rochat;
Novia A. Weiman, both of Beaverton,
all of Oreg.
[73] Assignee: Tektronix, Inc., Beaverton, Oreg.
[21] Appl. No.: 113,029
[22] Filed: Oct. 26, 1987
[51] Int. CI." G06F 15/626
[52] U.S. a 364/521; 358/80;
340/701
[58] Field of Search 364/518, 521, 522;
340/701, 703; 358/72, 76, 80, 22, 29, 28, 27, 26,
30
[56] References Cited
U.S. PATENT DOCUMENTS
4,379,292 4/1983 Minato et al 340/703 X
4,409,614 10/1983 Eichler et al 358/76
4,500,919 2/1985 Schreiber 358/78
4,500,972 2/1985 Kuhn et al 358/80
4,719,503 1/1988 Craver et al 358/13 X
4,769,695 9/1988 Terashita 358/80 X
Primary Examiner—M. H. Paschall
Assistant Examiner—A. Jonathan Wysocki
Attorney, Agent, or Firm—Patrick W. Hughey; Robert
S. Hulse
[57] ABSTRACT
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).
8 Claims, 4 Drawing Sheets
