How to retrieve specific pixels from an image based on the label
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Patrice Gaofei
le 1 Jan 2021
Commenté : Patrice Gaofei
le 3 Jan 2021
Hello everyone,
I am conducting some works on image restoration, particularly on specular reflection removal. I have obtained some results and I would like to evaluate the performance of my method using some quantitative metrics suh PSNR, SSIM, COV, etc. However, I would like to compute these metrics only for the regions that have restored. Please, how can I retrieve only the pixels of the restored regions from the processed images? This is the code I wrote for computing the evaluation metrics for the entire image.
allPSNR = zeros(1, numImages);
allSSIM = zeros(1, numImages);
for k = 1 : numImages
baseFileName = theFiles(k).name;
fullFileName = fullfile(theFiles(k).folder, baseFileName);
baseFileName1 = theFiles1(k).name;
fullFileName1 = fullfile(theFiles1(k).folder, baseFileName1);
lab = imread(fullFileName);
img = imread(fullFileName1);
allPSNR(k) = psnr(img, lab);
allSSIM(k) = ssim(img, lab);
end
meanPSNR = mean(allPSNR);
meanSSIM = mean(allSSIM);
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Image Analyst
le 1 Jan 2021
See if it will work for one-dimensional vectors:
allPSNR(k) = psnr(img(binaryImage), lab(binaryImage));
allSSIM(k) = ssim(img(binaryImage), lab(binaryImage));
6 commentaires
Image Analyst
le 2 Jan 2021
Of course pixel values at different locations can be equal. What if you had a completely uniform image where every single pixel in the entire image had the same gray scale value or RGB color? Maybe I'm not understanding what you're trying to say.
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