Image color correction system and method

Details Image color correction system and method Image color correction system and method

1989-05-31

1993-06-08

Nguyen, Phu K.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

395128, 340703, G06F 300

Patent

active

052186717

ABSTRACT:
A system and method for correcting errors in the colors of an image in a computer-aided design system; such errors being introduced by a process such as the production of a hard-copy of an image displayed on a graphic CRT. Tools are provided for the user to select "registered" colors and to determine, either manually or by system calculation, corrected values of such registered colors that will produce the desired image on the hard-copy. The manual selection technique provides tools for iteratively creating charts of related, but varied, color squares and sending the charts to the output device. The resulting hard-copy is compared by the user with the chart displayed on the CRT and the user's selection is processed by the system. In the other technique, the hard-copy image of such color chart is re-entered to the system through an input device and the error between the original and processed color patches is calculated and applied to determine corrected colors. Once a palette of registered and corrected colors is developed, it may be applied to correct images composed of such registered colors or to correct images composed of virtually any combination of colors. For the latter type of images, color values in the image that do not correspond to "registered" colors are corrected by creating a new 3-D color space based upon the existing registered colors and assigning a corrected value of each color as a result of the "influence" of adjacent registered colors in the created color space.

REFERENCES:
patent: 3693168 (1972-09-01), Halkyard et al.
patent: 4058849 (1977-11-01), Fitzgerald et al.
patent: 4959790 (1990-09-01), Morgan
patent: 4967373 (1990-10-01), Ginsburg
Commonly-Assigned, U.S. patent application Ser. No. 363,205 for Image Color Modification in a Computer-Aided Design System, filed Jun. 8, 1989 by Ho-Long Liao.
Foley, J. D., Van Dam, A. "Fundamentals of Interactive Computer Graphics" (pp. 611-616, Addison-Wesley, 1982).

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