发明名称 |
PATTERN RENDERING SYSTEM AND METHOD |
摘要 |
Techniques for black and white pattern rendering that increase processi ng speed and reduce memory requirements while providing improved pattern selection performance are provided. The hue angle and lightness of a color input are determined. The hue angle is used to index into a lookup table of halftone functions that specify default frequency and spot functions for a hue angle range. For each selected halftone, the determined hue angle is substituted from the hue angl e range if the determined hue angle differs from the last determined hue angle range by more than a threshold difference value. The determined lightness is used to determine the halftoning threshold value and rendering then occurs.
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申请公布号 |
CA2356813(A1) |
申请公布日期 |
2002.03.12 |
申请号 |
CA20012356813 |
申请日期 |
2001.09.10 |
申请人 |
XEROX CORPORATION |
发明人 |
BAI, YINGJUN;BENNETT, SCOTT A. |
分类号 |
B41J2/52;B41J2/525;G06T5/00;G06T7/00;H04N1/40;H04N1/46;H04N1/52;H04N1/60;(IPC1-7):H04N1/405 |
主分类号 |
B41J2/52 |
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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