麻烦帮我解释下matlab数字水印程序这是所有的程序:M=256; N=32; K=8; I=zeros(M,M); J=zeros(N,N); BLOCK=zeros(K,K);subplot(1,8,2); J=imread('C:\new\3.jpg'); imshow(J); title('水印图像'); subplot(1,3,2); I=imread('C:\new\2.jpg');

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