How can I implement mutual information?

2 次查看（过去 30 天）
Carmen Alabart Gutierrez del Olmo
编辑： Nirav Sharda 2016-12-15
I have been trying to implement Mutual Information equation, but the code seems that its not working fine. Can anyone help me?
fixed_current = uint8(fixed_current);
moving_current = uint8(moving_current);
v_x_y = zeros (256);
for i = 1:256
for j = 1:256
coord_r = fixed_current(i,j)+1;
coord_c = moving_current(i,j)+1;
v_x_y (coord_r,coord_c) = v_x_y (coord_r,coord_c) + 1;
end
end
p_x_y = v_x_y./ (256*256);
indNoZero = v_x_y ~= 0;
p_x_y_n0 = p_x_y(indNoZero);
% Define the entropy
H_x = entropy(fixed_current);
H_y = entropy(moving_current);
H_x_y = -sum(sum(p_x_y_n0.*log2(p_x_y_n0)));
% Define the MI
res = (H_x + H_y - H_x_y)/(max(H_x,H_y));
  1 个评论
Nirav Sharda
Nirav Sharda 2016-12-15
编辑：Nirav Sharda 2016-12-15
Are you getting any error messages or is the code giving incorrect results? Also, I was able to find some file exchange examples on this link .

请先登录，再进行评论。

请先登录，再回答此问题。

回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Statistics and Machine Learning Toolbox 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by