Description: The embedding and extraction algorithm of digital watermark based on DCT is realized. The original image is divided into 4*4 and the generated watermark information is embedded in 4*4 low frequency. Extraction is an embedded inverse. The algorithm works well. -
a watermarking based on dct\Cameraman.bmp
...........................\in.m
...........................\mark.bmp
...........................\out.m
...........................\Thumbs.db
a watermarking based on dct
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