In this paper, we limit the scope of our research to robust and imperceptible digital watermarking for copyright protection.
在本文中，我们将研究主要集中在用于版权保护的鲁棒的不可见数字水印。
Digital watermarking techniques can be used for purposes such as label, authentication, control and dada hiding etc, by embedding a secret imperceptible signal directly into the data to be protected.
数字水印技术通过向被保护的多媒体数据中加入透明的秘密信息，来达到标识、鉴别、控制或隐藏信息等作用。
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