Based on 8 × 8 sub-blocks have digital watermark embedding and extraction algorithm. This algorithm has been through debugging, you can directly run

Packet : 35738647matlabdctwatermark.rar filelist
matlabDCTwatermark\dct1117Q.m
matlabDCTwatermark\dct1117T.m
matlabDCTwatermark

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