发明授权
- 专利标题： Electronic watermark embedding apparatus for selectively embedding electronic watermark information in different frequency components of image data and electronic watermark embedding method
- 专利标题（中）： 电子水印嵌入装置，用于将图像数据和电子水印嵌入方法的不同频率分量中的电子水印信息选择性地嵌入
-
申请号： US12233096申请日： 2008-09-18
-
公开(公告)号： US08238600B2公开(公告)日： 2012-08-07
- 发明人: Takeshi Kuga , Shigeru Fujita , Hiroki Horikoshi , Akira Ichimura , Hideki Takemura , Hiroyuki Hosogoshi
- 申请人： Takeshi Kuga , Shigeru Fujita , Hiroki Horikoshi , Akira Ichimura , Hideki Takemura , Hiroyuki Hosogoshi
- 申请人地址： JP Tokyo
- 专利权人： Canon Kabushiki Kaisha
- 当前专利权人： Canon Kabushiki Kaisha
- 当前专利权人地址： JP Tokyo
- 代理机构： Fitzpatrick, Cella, Harper & Scinto
- 优先权： JP2007-244939 20070921
- 主分类号： G06K9/00
- IPC分类号： G06K9/00
摘要：
An electronic watermark embedding apparatus and an electronic watermark embedding method can severally deal with both of the resistance property of an electronic watermark and the prevention of image quality deterioration. Electronic watermark information of a high importance level is embedded in a component having a strong resistance property, and electronic watermark information of a low importance level is embedded in a component exerting little influence on an image quality. As a result, the electronic watermark information to be embedded in the component having a strong resistance property is limited to that of a high importance level. Moreover, the image quality deterioration can be suppressed in comparison with the case of embedding all pieces of information, and the electronic watermark information of low importance level is embedded in the component having a weak resistance property but exerting little influence on an image quality.
公开/授权文献
信息查询
