发明名称 |
Moire-free color halftone configuration employing common frequency vectors |
摘要 |
Disclosed herein is a method and apparatus for moiré-free color halftone printing with up to four color image separations. The method and apparatus utilize a plurality of non-orthogonal halftone screens to produce outputs that are moiré free and form uniform periodic rosettes. The method and apparatus provide for defining a first and a second color halftone screen fundamental frequency vector for each of three halftone screens such that the halftone screen set output forms uniform hexagonal rosettes; then defining a fourth color halftone screen where a first fundamental vector of the fourth screen shares a fundamental frequency vector with one of said three halftone screens and a second fundamental frequency vector of the fourth screen shares a fundamental frequency vector with a different one of said three color halftone screens.
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申请公布号 |
US7675651(B2) |
申请公布日期 |
2010.03.09 |
申请号 |
US20060565434 |
申请日期 |
2006.11.30 |
申请人 |
XEROX CORPORATION |
发明人 |
WANG SHEN-GE;LOCE ROBERT P |
分类号 |
G06K15/00 |
主分类号 |
G06K15/00 |
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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