Methods and apparatus for multigeneration color image processing

Details Methods and apparatus for multigeneration color image processing Methods and apparatus for multigeneration color image processing

1991-12-30

1994-04-26

Powell, Mark R.

Facsimile and static presentation processing

Natural color facsimile

Color correction

358504, 358525, 358522, 382 51, 382 54, G03F 308

Patent

active

053071824

ABSTRACT:
An image processing apparatus and method for performing the steps of grouping colors of a multi-pixel image stored in a memory into sets of colors, determining the average color of each set of colors, selecting a target color, for each set of colors, from a plurality of predetermined target colors, the selected target color being the predetermined target color that is closest to the average color of the set, and remapping the color of each pixel of the image stored in the memory to the target color selected for the set including that pixel. The method and apparatus are applicable to multigeneration color image reproduction devices such as color facsimile machines, color photocopiers, and the like.

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patent: 4907075 (1990-03-01), Braudaway
patent: 4941038 (1990-07-01), Walowit
patent: 4974071 (1990-11-01), Maeda
patent: 5047842 (1991-09-01), Bouman, Jr. et al.
patent: 5111286 (1992-05-01), MacDonald et al.
P. Laihanen, "Optimization of Digital Color Reproduction on the Basis of Visual Assessment of Reproduced Images", Proceedings of the SID, vol. 30, No. 3, pp. 183-190 (1989).
P. Laihanen, "Colour Reproduction Theory Based on the Principles of Colour Science", Advances in Printing Science and Technology, Jun. 1987 Conference, Pantech Press, London (1988).

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