发明名称 |
Image processing apparatus and method for accurately detecting character edges |
摘要 |
An image processing apparatus includes an edge amount calculating device configured to calculate edge amounts of an image in a plurality of directions for each of a plurality of frequency bands of the image. A character edge area determination device determines, based on the calculated edge amounts, whether or not a selected picture element of the image is of a character edge area. A sharpness control device corrects a frequency characteristic of the image by performing a first correction to the edge amounts when the selected picture element is determined to be of a character edge area by the character edge area determining device, and by performing a second correction to the edge amounts when the selected picture element is determined not to be of a character edge area by the character edge area determining device. |
申请公布号 |
US2003007186(A1) |
申请公布日期 |
2003.01.09 |
申请号 |
US20020188133 |
申请日期 |
2002.07.03 |
申请人 |
SUINO TOORU;SHIBAKI HIROYUKI;MORIMOTO ETSUO |
发明人 |
SUINO TOORU;SHIBAKI HIROYUKI;MORIMOTO ETSUO |
分类号 |
G06K15/02;G06T5/00;G06T5/20;H04N1/40;H04N1/409;(IPC1-7):G06K15/00;G06K1/00;H04N1/405 |
主分类号 |
G06K15/02 |
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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