Half-tone processing method

Details Half-tone processing method Half-tone processing method

1997-02-25

1999-10-26

Lee, Thomas D.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358456, 358457, 382252, H04N 140

Patent

active

059737948

ABSTRACT:
A half-tone processing method includes the steps of generating a half-tone processed pixel value h(u,v) determined by comparing a pixel value f'(u,v) with the dither matrix g(u,v) having the corresponding threshold values, computing an error value e(u,v) between a half-tone processed pixel value h(u,v) and an original pixel value f(u,v), and recomputing a pixel value f'(u+m,v+n) by diffusing the error value e (u,v) to the adjacent pixel f(u+m,v+n) of the original pixel value f(u,v) corresponding to f'(u,v).

REFERENCES:
patent: 5150429 (1992-09-01), Miller et al.
patent: 5172247 (1992-12-01), Ghaderi
patent: 5321525 (1994-06-01), Hains

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