发明名称 |
Image processing apparatus with reduced image deterioration in highlight portions |
摘要 |
An image processing apparatus binarizes input multi-level pixel data by changing the same either to the minimum density data corresponding to white or to a minimum reproducible density data corresponding to the minimum density level reproducible by an image forming apparatus such as a printer, when the density defined by the input multi-level pixel data is of such a low level that it cannot be reproduced by the image forming apparatus. Error incurred by the binarization is reflected in the succeeding binarizing process so that the density of the whole image is preserved, whereby an image with a highlight portion can be recorded with reduced degradation of the image quality at the highlight portion.
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申请公布号 |
US5359433(A) |
申请公布日期 |
1994.10.25 |
申请号 |
US19930118783 |
申请日期 |
1993.09.10 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
NAGASE, YUKIO;KEMMOCHI, KAZUHISA |
分类号 |
B41J2/52;B41J2/44;G03G15/04;H04N1/40;H04N1/403;H04N1/405;(IPC1-7):H04N1/40 |
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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