Digital watermarking is a technique that embeds copyright information, such as figures, sequence numbers, words, and image logos and so on, imperceptibly into multimedia data.

• 数字水印技术就是将数字、序列号、文字、图像标志等版权信息嵌入到多媒体数据中的一种技术，用来跟踪多媒体数据的发布与使用。