be_count.m

matlab写的lzw和huffman的编码

function c=be_count(x)
%算直方图
c=zeros(1,256);
for k=0:255
    for i=1:size(x)
        for j=1:size(x)
           if x(i,j)==k
               c(k+1)=c(k+1)+1;
           end
       end
   end
end
c=c./(size(x)*size(x)'/2);