histcmpchi2.m~

来自「卡尔曼滤波器的matlab代码是卡尔曼滤波MATLAB工具箱」· M~ 代码 · 共 16 行

function d = histCmpChi2(h1, h2)
% Compare two histograms using chi-squared
% function d = histCmpChi2(h1, h2)
%
% d(i,j) = chi^2(h1(i,:), h2(j,:)) = sum_b  (h1(i,b)-h2(j,b)^2 / (h1(i,b) + h2(j,b))

[N B] = size(h1);
d = zeros(N,N);
for i=1:N
  h1i = repmat(h1(i,:), N, 1);
  numer = (h1i - h2).^2;
  denom = h1i + h2;
  d(i,:) = numer ./ denom;
end