互信息matlab源代码

% Compute Mutual Information and Joint entropy of two images % Takes two images and returns the mutual information and joint % entropy. For implementing this function also download function % joint_histogram.m in my file exchange. % % written by Amir Pasha Mahmoudzadeh % Wright State University %

function h=joint_histogram（xy）
%
% Takes a pair of images of equal size and returns the 2d joint histogram.
% used for MI calculation
% 
% written by Amir Pasha Mahmoudzadeh
% Wright State University
% Biomedical Imaging Lab



rows=size（x1）;
cols=size（y2）;
N=256;

h=zeros（NN）;

for i=1:rows;   
  for j=1:cols;   
    h（x（ij）+1y（ij）+1）= h（x（ij）+1y（ij）+1）+1;
  end
end

imshow（h）

end

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     文件        1123  2013-04-12 11:23  MutualInformation\MutualInformation.m
     文件         426  2013-04-02 16:09  MutualInformation\joint_histogram.m
     文件        1344  2013-04-02 16:09  MutualInformation\license.txt
     目录           0  2013-04-12 11:12  MutualInformation\