发明授权
- 专利标题： Water-mark embedding method and system
- 专利标题（中）： 水印嵌入法和系统
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申请号： US09144467申请日： 1998-09-01
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公开(公告)号： US06728408B1公开(公告)日： 2004-04-27
- 发明人: Isao Echizen , Hiroshi Yoshiura , Masafumi Nakamura , Takao Arai , Toshifumi Takeuchi
- 申请人： Isao Echizen , Hiroshi Yoshiura , Masafumi Nakamura , Takao Arai , Toshifumi Takeuchi
- 优先权： JP9-238030 19970903; JP10-106037 19980416
- 主分类号： G06K900
- IPC分类号： G06K900
摘要：
A data embedding method and apparatus and a data reproducing method and apparatus are provided which can apply a digital watermark to various contents. Instead of embedding watermarking information in respective pixels or by using a relation between pixels, the watermarking information is embedded as a position pattern of changed pixels in the contents. Reliability comparable with conventional techniques can be obtained irrespective of a change in a smaller number of pixels for the contents.