%解碼
C=[];
for i=1:nn
    C=[C,Q(codenumber(i))];
end
for i=1:nn
    re_sig(i,:)=I12(C(i),:);
end
for ni=1:nn
    for nj=1:ss
        f1=floor(ni./num);
        f2=mod(ni,num);
        if f2==0
            f2=num;
            f1=f1-1;
        end
        m1=floor(nj./siz_word)+1;
        m2=mod(nj,siz_word);
        if m2==0
            m2=siz_word;
            m1=m1-1;
        end
        re_re_sig(siz_word*f1+m1,siz_word*(f2-1)+m2)=re_sig(ni,nj);
    end
end
figure(2);
imagesc(re_re_sig);
colormap(gray);