Error detection/correction and fault detection/recovery – Pulse or data error handling – Error count or rate
Patent
1997-10-31
1999-08-03
Chung, Phung M.
Error detection/correction and fault detection/recovery
Pulse or data error handling
Error count or rate
358456, 382252, 382255, G06F 1100
Patent
active
059319607
ABSTRACT:
A method and system accumulates an error from an error diffusion process used for rendering continuous images. A scan from an original document generates a plurality of original pixel values which are adjusted by an accumulated error value corresponding to the total effect of neighboring pixels. The adjusted pixel error value is determined between the adjusted pixel value and an output. The adjusted pixel error value is weighted by a predetermined weighting technique and diffused among a plurality of neighboring pixel locations to generate a plurality of intermediate pixel error values. Intermediate pixel errors are accumulated and stored in an error buffer before being combined with an original pixel value. Repetitive access to a memory location associated with the adjusted pixel value is obviated by accumulation of the intermediate pixel values in intermediate registers. A compressor compresses the diffused error values before storage in a buffer as accumulated error values.
REFERENCES:
patent: 4937666 (1990-06-01), Yang
patent: 5608821 (1997-03-01), Metcalfe et al.
patent: 5825509 (1998-10-01), Nomura
Curry Donald J.
Kletter Doron
Chung Phung M.
Xerox Corporation
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