发明名称 |
Threshold value matrix, image processing apparatus, image forming apparatus and printer driver |
摘要 |
A threshold value matrix is used for converting a multi-level image data into a plural-level image data which represents a dot pattern by a smaller number of gradation levels than the multi-level image data, and comprises threshold values used for making a dot representation solely by a dot pattern while maintaining an identical keytone for all halftone levels.
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申请公布号 |
US7499198(B2) |
申请公布日期 |
2009.03.03 |
申请号 |
US20040517356 |
申请日期 |
2004.11.22 |
申请人 |
RICOH COMPANY, LTD |
发明人 |
HIRANO MASANORI |
分类号 |
B41J2/01;H04N1/405;B41J2/205;B41J2/52;G06T5/00;H04N1/40 |
主分类号 |
B41J2/01 |
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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