发明名称 |
Image processing method and apparatus |
摘要 |
An image processing apparatus includes an input unit for inputting image information, and a conversion unit for comparing the input image information with a plurality of threshold values and converting the input image information into data of three or more levels, wherein the conversion unit converts the input image information so as to form a dot at the central area of a screen mask if the input image information is low in density, and converts the input image information so as to form dots at the whole area of a screen mask if the input image information is middle and high in density.
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申请公布号 |
US5777759(A) |
申请公布日期 |
1998.07.07 |
申请号 |
US19960637442 |
申请日期 |
1996.04.25 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
KABURAGI, HIROSHI;ICHIKAWA, HIROYUKI |
分类号 |
H04N1/40;H04N1/405;(IPC1-7):H04N1/21 |
主分类号 |
H04N1/40 |
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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