Method of high addressability error diffusion

Details Method of high addressability error diffusion Method of high addressability error diffusion

1994-08-03

1997-03-04

Boudreau, Leo

Image analysis

Image compression or coding

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382237, 382299, 358429, 358445, 358447, 358457, G06K 936

Patent

active

056088213

ABSTRACT:
A method and system implements a high addressability characteristic into an error diffusion process. A grey level value representing a pixel is received: The grey level value has a first resolution which corresponds to an original input resolution. The grey level value is interpolated to generate subpixel grey level values which correspond to a second resolution. The second resolution is higher than the first resolution and corresponds to the high addressability characteristic. A threshold circuit thresholds the interpolated grey level value and generates an error value as a result of the threshold. The error value has a resolution corresponding to the first resolution. A portion of the error value is diffused to adjacent pixels on a next scanline.

REFERENCES:
patent: 4829587 (1989-05-01), Glazer et al.
patent: 5258854 (1993-01-01), Eschbach
patent: 5327256 (1994-07-01), Kang et al.
patent: 5410615 (1995-04-01), Mailloux

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