发明名称 |
Dither pattern generating apparatus for generating dither pattern corrected for density change accompanying deterioration with time |
摘要 |
In a printer which corrects a density change by measuring densities of a plurality of output dither patterns (test patterns) by a sensor and obtaining a gamma characteristic curve, the following processes are performed. Data of the present number of print sheets is obtained from a print sheet counter in the printer. On the basis of the obtained data, a proper sensor density curve is selected. A sensor value obtaining unit obtains density data of a generated test pattern. On the basis of the selected sensor density curve and the obtained density data, a gamma characteristic curve is calculated. A dither pattern is generated based on the gamma characteristic curve.
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申请公布号 |
US7639377(B2) |
申请公布日期 |
2009.12.29 |
申请号 |
US20040008223 |
申请日期 |
2004.12.10 |
申请人 |
KONICA MINOLTA BUSINESS TECHNOLOGIES, INC. |
发明人 |
AIHARA NOBUHIRO;SAKAI HIROSHI |
分类号 |
G06F15/00;G06K1/00;G06K15/00 |
主分类号 |
G06F15/00 |
代理机构 |
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