Selective color correction

Details Selective color correction Selective color correction

1994-10-14

1996-04-09

Nguyen, Phu K.

G03F 308

Patent

active

055069460

ABSTRACT:
A method and apparatus for modifying colors in an image displayed on a display device by a computer controlled display system. The method includes selecting at least one color being representative of at least one pixel of the image, where the image includes a plurality of pixels on the display device; determining the colorimetric values for the at least one color; selecting a second color and determining the colorimetric values for the second color; and modifying the colorimetric values of a plurality of pixels in said image such that for any given pixel of the plurality of pixels having colorimetric values being matched to the colorimetric values of the at least one color, then the colorimetric values of the given pixel are modified to match the colorimetric values of the second color. The apparatus of the invention includes a display device; a cursor positioning device; a plurality of smoothed, look-up tables to provide a selection of a region of a color space, which selection is representative of a portion of said image near the at least one color; memory for storing data representative of the region and a second color; and a data processing unit. The method and apparatus allow a selection and automatic modification of a group of colors while maintaining the relationship among the colors so as to appear relatively the same with respect to texture and tonality.

REFERENCES:
patent: 4975861 (1990-12-01), Fujimoto
patent: 5103407 (1992-04-01), Gabor
patent: 5130935 (1992-07-01), Takiguchi
patent: 5212546 (1993-05-01), Arazi et al.
MacDraw II User's Guide, from Claris Corporation of Santa Clara, California, 1991, pp. 6-11.
Adobe Photoshop TM from Adobe Systems Corporation from Mountain View, California pp. 67-73, 1991.
Adobe Photoshop Tutorial from Adobe Systems Corporation from Mountain View, California pp. 51-52, 1991.
PaintWorks Gold TM from Activision of Mountain View, California, 1987, pp. i-iii, 55, 128, 129.

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