matlab 图像压缩问题clearInitialImage=imread('lena.bmp');%rat=4;InitialImage=double(InitialImage)/255;% figure(1);imshow(InitialImage);%T=dctmtx(8);DCTCoe=blkproc(InitialImage,[8 8],'P1*x*P2',T ,T');%CoeVar=im2col(DCTCoe,[8 8],'distinct');Coe=Co

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