数字水印 ........\embed.m ........\experiment1.m ........\experiment2.m ........\experiment3.m ........\intensity.m ........\marked.mat ........\marked3.bmp ........\marked4.bmp ........\pick_up.m ........\read_me.txt ........\Torus.m ........\watermark.bmp ........\Wpick.bmp ........\Wpick.mat