matlab 经典图像压缩技术function [h,l] = huffman(p);
% HUFFMAN Huffman code generator
% [h,l] = huffman(p), Huffman code generator
% returns h the Huffman code matrix, and l the
% average codeword length for a source with
% probabilty vector p.
if length(find(p10e-10,
error('Not a prob. vector , components do not add up to 1')
end
n = length(p);
q = p;
m = zeros(n-1,n);
for i = 1:n-1
[q,l] = sort(q);
m(i,:)=[l(1:n-i+1),zeros(1,i-1)];
q=[q(1)+q(2),q(3:n),1];
end
for i =1:n-1
c(i,:)=blanks(n*n);
end
c(n-1,n)='0';
c(n-1,2*n)='1';
for i =2:n-1
c(n-i,1:n-1) = c(n-i+1,n*(find(m(n-i+1,:)==1))-(n-2):n*(find(m(n-i+1,:)==1)));
c(n-i,n)='0';
c(n-i,n+1:2*n-1)=c(n-i,1:n-1);
c(n-i,2*n)='1';
for j =1:i-1
c(n-i,(j+1)*n+1:(j+2)*n)=c(n-i+1,n*(find(m(n-i+1,:)==j+1)-1)+1:n*find(m(n-i+1,:)==j+1));
end
end
for i = 1:n
h(i,1:n)=c(1,n*(find(m(1,:)==i)-1)+1:find(m(1,:)==i)*n);
ll(i)=length(find(abs(h(i,:))~=32));
end
l =sum(p.*ll);
2021-10-11 10:36:27
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用java实现的，可以把yv12的图片压缩到想要的分辨率。文件中还有YV12和I420转NV21的算法。
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行业分类-设备装置-基于典范多元分解的头相关脉冲响应三维数据压缩方法.zip
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ajax+pako.js实现gzip数据压缩上传，解决post数据过长问题
http://blog.csdn.net/jodenhe/article/details/70983781
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