发明名称 |
Clustered dot and line multilevel halftoning for electrographic color printing |
摘要 |
A method is disclosed for rendering monochrome or colored continuous tone images by a system having restricted continuous tone rendering capabilities, such as electrographic printers capable of printing more than two density levels on each addressable micro dot. A method for preferred halftone dot growth is described, starting from isolated dots arranged along base lines and auxiliary lines, evolving to high density lines along the base lines and approximating full continuous tone rendition for high density regions. Preferred arrangements for the orientation, spacing and absolute location of the base lines and auxiliary lines are disclosed and a method to generate preferred arrangements. A moire free combination of three halftone images is described for the reproduction of color images. A method to select a restricted set of energy levels to obtain linear reflectance response is disclosed. Halftone cells are arranged in supercells to improve the density resolution of the system.
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申请公布号 |
US5982989(A) |
申请公布日期 |
1999.11.09 |
申请号 |
US19970799335 |
申请日期 |
1997.02.13 |
申请人 |
AGFA GEVAERT N.V. |
发明人 |
BRODDIN, DIRK;DESCHUYTERE, FRANK |
分类号 |
B41J2/52;G03G15/01;H04N1/40;(IPC1-7):H04N1/46 |
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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