ex8-extractwatermark
代码说明：
水印要求完全不被修改，完全脆弱水印一般是从空域LSB算法演变而来。(Watermark demands nothing to modify, the fragile watermark is completely general LSB algorithm has evolved the airspace。)
文件列表：
实验八、完全脆弱图像水印(未提交)
................................\checksum.asv,1245,2014-05-04
................................\checksum.m,1276,2014-05-13
................................\extractwatermark.asv,1218,2014-05-09
................................\extractwatermark.m,1145,2014-05-09
................................\modpic.m,352,2014-05-09
................................\randselect.m,791,2009-02-21
................................\温德志_050_实验八.doc,296960,2014-06-06
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