Method for producing a multitone image

Details Method for producing a multitone image Method for producing a multitone image

1994-01-12

1994-11-01

Chilcot, Jr., Richard E.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358500, 382 47, H04N 146, G06K 942

Patent

active

053611390

ABSTRACT:
The present invention relates to a method for producing multitone image data from data representative of an original image and, in particular, for producing multitone image data with a set of N output darkness levels U greater than 2 from original darkness values V.sub.o representative of an original image.

REFERENCES:
patent: 4977464 (1990-12-01), Ikuta
patent: 5157507 (1992-10-01), Yamada
patent: 5285271 (1994-02-01), Gennetten
Robert Floyd and Louis Steinberg, "An Adoptive Algorithm for Spatial Grey Scale," Society for Information Display (SID) 75 Digest, pp. 36-37, 1975.
Thomas M. Holladay, "An Optimum Algorithm for Halftone Generation for Displays and Hard Copies," Proceedings of the SID, vol. 21/2, pp. 185-192, 1980.
Donald E. Knuth, "Digital Halftones by Dot Diffusion," ACM Transactions on Graphics, vol. 6, No. 4, pp. 245-273, Oct. 1987.

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