发明名称 |
Apparatus, method, software and medium storage for performing the tasks of detecting specified marks |
摘要 |
A technique is disclosed to detect a specified mark that has been rotated by an unknown number of degrees. To make the detection efficient, the dictionary stores the specified marks in predetermined formats including the coordinate conversion table and the polar coordinate image. Furthermore, the coordinate conversion table includes the central distance D scale value indicative of a distance between a center of each of the pixels and a center of the dictionary image in the predetermined XY coordinate and the central rotation direction F scale value indicative of a degree of rotation of the dictionary image.
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申请公布号 |
US7305664(B2) |
申请公布日期 |
2007.12.04 |
申请号 |
US20030681857 |
申请日期 |
2003.10.07 |
申请人 |
RICOH COMPANY, LTD. |
发明人 |
YAMAGATA HIDEAKI |
分类号 |
G06K9/32;G06T7/00;G06F9/45;G06T3/00 |
主分类号 |
G06K9/32 |
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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