Positive feedback error diffusion signal processing

Details Positive feedback error diffusion signal processing Positive feedback error diffusion signal processing

1993-11-17

1994-12-13

Ramirez, Ellis B.

Boots, shoes, and leggings

364514, G06F 1520

Patent

active

053734556

ABSTRACT:
A method for processing signals to diffuse quantization error spatially or temporally. Positive feedback of the quantization error is used to reduce the relative noise for the low frequencies of the spectrum. According to a preferred implementation in a two-dimensional spatial application involving a base pixel and three adjacent orthogonally arranged pixels, error attributable to quantization at the base pixel location is provided as positive feedback for the quantization of the diagonally adjacent pixel. Offsetting and complementary values of the quantization error are also diffused to the remaining two diagonally positioned pixels. The composite of the four pixels forms a square with a zero net error diffusion along the horizontal, vertical and diagonal orientations.

REFERENCES:
patent: Re31720 (1984-10-01), De Freitas et al.
patent: 4099122 (1978-07-01), van Buul
patent: 4186384 (1980-01-01), Acker
patent: 4217609 (1980-08-01), Hatori et al.
patent: 4229820 (1980-10-01), Enomoto
patent: 4254502 (1981-03-01), De Freitas et al.
patent: 4270027 (1981-05-01), Agrawal et al.
patent: 4313204 (1982-01-01), DeFreitas
patent: 4519085 (1985-05-01), Catros
patent: 4807250 (1989-02-01), Tanaka
patent: 5020120 (1991-05-01), Weldy
patent: 5055843 (1991-10-01), Ferguson, Jr. et al.
patent: 5079551 (1992-01-01), Kimura et al.
IBM Technical Disclosure Bulletin vol. 28, No. 3, Aug. 1985.
IBM Technical Disclosure Bulletin vol. 30, No. 10, Mar. 1988.
Proceedings of the S.I.D. vol. 24, No. 3, 1983, Los Angeles, Calif. pp. 253-258. C. Billotet-Hoffmann, et al.: `On the error diffusion technique for electronic halftoning`.

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