发明名称 |
Method of and apparatus for generating high-resolution binary image data with respect to linear edges. |
摘要 |
An image data extracting circuit extracts multi-gradation image data obtained by reading a binary original by prescribed image regions about a pixel to be processed and latches the same. A linear edge detecting circuit detects a pixel to be processed corresponding to a linear edge portion of the original that is in conformity to the scanning direction by mutually comparing the gradients of the respective latched pixels. The circuit outputs a signal expressing linear edge patterns thereof and a signal expressing the gradient, i.e., density thereof. A second high-resolving circuit receives the signals to generate high-resolution binary image data forming a smooth linear edge having a resolution higher than the read resolution with an average density in response to the gradient of the pixel to be processed. |
申请公布号 |
EP0234590(B1) |
申请公布日期 |
1994.05.04 |
申请号 |
EP19870102806 |
申请日期 |
1987.02.27 |
申请人 |
DAINIPPON SCREEN MFG. CO., LTD. |
发明人 |
SHIBAZAKI, HIROSHI |
分类号 |
H04N1/387;G06K9/38;G06T3/40;G06T5/00;H04N1/405;H04N1/409 |
主分类号 |
H04N1/387 |
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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