：数字水印技术作为数字媒体版权保护的有效办法，近年来在国内外引起了人们极大的兴趣。作者采用了DCT离散余弦变换的算-: An effective means of digital watermarking technology as a digital media copyright protection, both at home and abroad in recent years caused a great deal of interest. The author uses the discrete cosine transform DCT operator