lena图的编码

matlab代码实现灰度图像的编码问题Image1=imread('Lena.tiff');w=imread('logo1.bmp');w=double(w);%xianshi;number=input('inputthenumber:');Image1=suoxiao('Lena.tiff',number);[imagemimagen]=size(Image1);Sr=4;Sd=8;Rnum=(imagem/Sr)*(imagen/Sr);Dnum=(imagem/Sd)*(imagen/Sd);Image2=zeros(Dnum,Sr