This the realization of digital watermarking algorithm based on discrete cosine of DCT, picture free choice, can of the embedded watermark image of various attacks watermark extraction. Strong robustness.

DCT水印\fuyonghua.bmp
.......\gongji.m
.......\key.mat
.......\lena.bmp
.......\lenaattack2.jpg
.......\tiqu.m
DCT水印

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