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I want to measure entropy and PSNR to N number of images

Asked by Abdullah on 23 Apr 2017
Latest activity Edited by Image Analyst
on 23 Apr 2017
clc
clear all
srcFiles = dir('----\*.jpg'); % the folder in which ur images exists
for i = 1 : length(srcFiles)
filename = strcat('----',srcFiles(i).name);
I = imread(filename);
end
E = entropy(I);
It returns to me one value only.

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1 Answer

Answer by Image Analyst
on 23 Apr 2017
Edited by Image Analyst
on 23 Apr 2017
 Accepted Answer

Yes that's true. You're only calling it on the very last image you read in. If you want a value for every image, put it in the loop and index it.
for i = 1 : length(srcFiles)
filename = strcat('----',srcFiles(i).name);
I = imread(filename);
E(i) = entropy(I);
end
If you want a value for every pixel in the image, use entropyfilt() instead of entropy().
entropyImage{i} = entropyfilt(I);
You can compute PSNR with the Image Processing Toolbox function called psnr().

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