发明授权
- 专利标题: Method for reducing 2-color moire in 4-color printing
- 专利标题(中): 降低4色印刷中2色莫尔条纹的方法
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申请号: US237577申请日: 1994-05-03
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公开(公告)号: US5381247A公开(公告)日: 1995-01-10
- 发明人: Charles M. Hains
- 申请人: Charles M. Hains
- 申请人地址: CT Stamford
- 专利权人: Xerox Corporation
- 当前专利权人: Xerox Corporation
- 当前专利权人地址: CT Stamford
- 主分类号: B41M1/14
- IPC分类号: B41M1/14 ; G06T5/00 ; H04N1/46 ; H04N1/52
摘要:
A method of halftone printing in four colors using, for cyan, magenta and black, halftone screens that will result in screening angles of 15, 45 and 75 degrees, as is the standard process in the art, and a halftone screen for yellow that will result in screening angles of 0, +60 and -60 degrees. This combination will diminish the 2 color moire patterns that result from the interaction between the yellow and one of the other colorants. The 0 and + or -60 degree screening angles are generated by using a screen that produces a four-centered cell having dots that are spaced to form hexagons, when the nearest neighbors of a central dot are connected by lines, as opposed to the conventional trapezoidal orientation.
公开/授权文献
- US4341098A Jet pattern dyeing of material, particularly carpet 公开/授权日:1982-07-27
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