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发明名称
Efficient CAPTCHA System by Determining the Orientation of Cropped Sub-Image and Method for Sub-Image Providing of the same
摘要
申请公布号
KR101113197(B1)
申请公布日期
2012.02.16
申请号
KR20100018090
申请日期
2010.02.26
申请人
发明人
分类号
H04L9/32
主分类号
H04L9/32
代理机构
代理人
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