Color digital halftoning with vector error diffusion

Details Color digital halftoning with vector error diffusion Color digital halftoning with vector error diffusion

1989-10-10

1991-12-03

Orsino, Joseph A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 75, 358 80, 358443, H04N 140

Patent

active

050704133

ABSTRACT:
A halftoning method for creating a color binary image from a continuous tone color image or computer generated graphics signal is improved by diffusing color vector error and by including the visual color blur functions in the recursive error propagation algorithm so that perceived color vector rather than binary color error is propagated.

REFERENCES:
patent: 4623973 (1986-11-01), Hoffrichter et al.
patent: 4654721 (1987-03-01), Goertzel et al.
patent: 4667237 (1987-05-01), Yokomizo
patent: 4688995 (1987-05-01), Chen et al.
patent: 4876610 (1989-10-01), Ohsawa et al.
patent: 4878125 (1989-10-01), Katayama et al.
patent: 4884130 (1989-11-01), Huntsman
"Color & Color Mixture Scalar & Vector Fundamentals" by J. B. Cohen, vol. 13, No. 1, Feb. 1988.
"Contrast Constancy: Deblurring in Human Vison by Spatial Frequency Channels" by M. A. Georgeson et al.
"Digital Halftoning of Images" by Anastassiou and Pennington, IBM, Res. Dev., vol. 26, No. 6, Nov. 1982.

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