发明授权
- 专利标题： Electronic watermarking system capable of providing image data with high secrecy
- 专利标题（中）： 电子水印系统能够高度保密地提供图像数据
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申请号： US09306442申请日： 1999-05-06
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公开(公告)号： US06456724B1公开(公告)日： 2002-09-24
- 发明人: Junya Watanabe
- 申请人： Junya Watanabe
- 优先权： JP10-123690 19980506
- 主分类号： G06K900
- IPC分类号： G06K900
摘要：
In an electronic watermarking device for inserting an electronic watermark into an original image, discrete cosine transformer carries out discrete cosine transform of a partial block of the original image, inserting unit inserts electronic watermarking data into an output of the discrete cosine transformer, inverse discrete cosine transformer carries out inverse discrete cosine transform of an output of the inserting unit, and coordinate converter which has coordinate conversion data carries out coordinate conversion of an output of the inverse discrete cosine transformer by the electronic watermarking data and the coordinate conversion data.
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