Display-based color system

Patent 4843573 Issued on June 27, 1989. Estimated Expiration Date:

October 26, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Method and system for displaying colors utilizing tristimulus values
Patent #: 4379292
Issued on: 04/05/1983
Inventor: Minato , et al.

Method for the reproduction of originals which, with respect to their color content, are scanned according to a tristimulus method
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Inventor: Schreiber

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Patent #: 4500972
Issued on: 02/19/1985
Inventor: Kuhn , et al.

Display processor with color matrixing circuitry and two map memories storing chrominance-only data
Patent #: 4719503
Issued on: 01/12/1988
Inventor: Craver , et al.

Method of detecting principal subject images and determining exposures in color printing Patent #: 4769695
Issued on: 09/06/1988
Inventor: Terashita

Inventors

Assignee

Tektronix, Inc.

Application

No. 07/113029 filed on 10/26/1987

US Classes:

345/591, Color processing in perceptual color space345/604, Color space transformation (e.g., RGB to YUV)358/518Color correction

Examiners

Primary: Paschall, Mark H.
Assistant: Wysocki, Jonathan

Attorney, Agent or Firm

International Classes

G09G 5/02 (20060101)
H04N 9/64 (20060101)

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).