comparison of two histograms using pdist2
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Muhammad Ali Qadar
le 23 Août 2013
Commenté : Devarshi Patel
le 10 Déc 2018
hi, I am having two Images I wanted compare these two Images by histograms I have read about pdist that provides 'chisq' but i think the way i am doing is not correct, and what to do to show the result afterwards because this is giving a black image.
i1=imread('blue_4.gif');i1=i1(:,:,1);
[c1,n]=imhist(i1);
c1=c1/size(i1,1)/size(i1,2);
i2=imread('blue_5.jpeg');i2=i2(:,:,1);
[c2,n2]=imhist(i2);
c2=c2/size(i2,1)/size(i2,2);
d=pdist2(c1,c2,'chisq');
please give me a working example thanks
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Raghunandan
le 31 Oct 2014
Modifié(e) : Raghunandan
le 31 Oct 2014
Just wanted to let you know that pdist2 in MATLAB uses 'Euclidean' distance by default. If you are looking to get 'ChiSquare' distance, please use the code found here.
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ndoum ekanga steve willy
le 27 Nov 2015
Modifié(e) : ndoum ekanga steve willy
le 27 Nov 2015
But this doesnt give me any output, i cant even see the similarity.
% read two images Im1 = imread('ckt_1.tif'); Im2 = imread('ckt_3.tif');
% convert images to type double (range from from 0 to 1 instead of from 0 to 255) Im1 = im2double(Im1); Im2 = im2double(Im2);
% Calculate the Normalized Histogram of Image 1 and Image 2 hn1 = imhist(Im1)./numel(Im1); hn2 = imhist(Im2)./numel(Im2);
% Calculate the histogram error
f = sum((hn1 - hn2).^2); f; %display the result to console
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