发明名称 |
System and method for redistributing error values from an error diffusion process |
摘要 |
A method and system implements a redistributive characteristic into an error diffusion process. A grey level value representing a pixel is received. A threshold circuit thresholds the received grey level value and generates an error value as a result of the threshold. A portion of the error value is diffused to adjacent pixels on a next scanline. All the error for a single pixel on the next scanline is accumulated. Since this accumulated error has a greater number of bits than can be stored in a buffer, a portion of the accumulated error is truncated and redistributed to a down stream pixel for inclusion in the downstream pixel's error accumulation process. The grey level value has a first resolution which corresponds to an original input resolution. In a high addressabilty environment, the received grey level value is interpolated to subpixel grey level values before thresholding.
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申请公布号 |
US5696601(A) |
申请公布日期 |
1997.12.09 |
申请号 |
US19940285265 |
申请日期 |
1994.08.03 |
申请人 |
XEROX CORPORATION |
发明人 |
METCALFE, DAVID J.;SHIAU, JENG-NAN;WILLIAMS, LEON C. |
分类号 |
H04N1/403;H04N1/405;(IPC1-7):H04N1/40 |
主分类号 |
H04N1/403 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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