Binarizing method for color image using modified error diffusion

Details Binarizing method for color image using modified error diffusion Binarizing method for color image using modified error diffusion

1991-03-19

1993-02-02

Couso, Jose L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 80, 358298, 358458, H04N 146

Patent

active

051842130

ABSTRACT:
The binarizing method uses a diffusion coefficient matrix for error diffusion that has a two dimensional frequency and fixedly corresponds to each pixel of the input image, and error that is produced by comparing the referred input pixel value and threshold value is divided in the proportion of the diffusion coefficients in the sub matrix of the diffusion coefficient matrix and those divided errors are added to pixels neighboring the referred pixel, and the diffusion coefficient matrixes for each color are rotated with mutually different angles in the case of color printing.

REFERENCES:
patent: 4626901 (1986-12-01), Tanioka
patent: 4680625 (1987-07-01), Shoji et al.
patent: 4692811 (1987-09-01), Tsuchiya et al.
patent: 4809063 (1989-02-01), Moriguchi et al.
patent: 4974067 (1990-11-01), Suzuki et al.

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