DCT域的去水印

dct域的水印程序:marksize()x=()*;y=()*;p()=after_2(x+,y+);%将之前改变过数值的点的数值提取出来p()=after_2(x+,y+);p()=after_2(x+,y+);p()=after_2(x+,y+);p()=after_2(x+,y+);p()=after_2(x+,y+);p()=after_2(x+,y+);p()=after_2(x+,y+);ifcorr2(p,k1)>corr2(p,k2)%corr2计算两个矩阵的相似度，越接近1相似度越大mark_2()=%比较提取出来的数值与随机频率k1和k2的相似度，还原水印图样elsemark_2()=