Batch processing images from 2 folders and saving them to another folder
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Aero Descerazes
il 12 Feb 2022
Modificato: Image Analyst
il 12 Feb 2022
Hello, I have two folders, Folder A and Folder B with unit8 binary images of same corresponding file names.
The folder structure is as follows:
Folder A
Image 1.bmp
Image 2.bmp
Image 3.bmp
...
Folder B
Image 1.bmp
Image 2.bmp
Image 3.bmp
...
I want to perform a simple operation imsubtract between the same filenames in the two folders. For example, (Image 1 from Folder A) - (Image 1 from Folder B). Similary (Image 2 from Folder A) - (Image 2 from Folder B), and so on. I want to batch process these, and save it to a different folder (e.g. Folder C). How would I go about doing this?
I have 400 images in Folder A and 400 images in Folder B with the same corresponding filenames. I want to batch export calculated 400 files (in for e.g. Folder C). Any help is very appreciated.
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Image Analyst
il 12 Feb 2022
Modificato: Image Analyst
il 12 Feb 2022
Do you want floating point differences? Positive and negative values allowed? Or do you want the absolute difference of the subtraction, like you'd get with imabsdiff(). I'll show the later
foldera = 'C:/imagesa';
folderb = 'C:/imagesb';
folderc = 'C:/imagesc';
if ~isfolder(folderc)
mkdir(folderc);
end
fileListA = dir(fullfile(foldera, '*.bmp'))
fileListB = dir(fullfile(folderb, '*.bmp'))
for k = 1 : length(fileListB)
% Build file names.
fileNameA = fullfile(foldera, fileListA(k).name);
fileNameB = fullfile(folderb, fileListB(k).name);
% Read them in.
imageA = imread(fileNameA);
imageB = imread(fileNameB);
% Compute difference
diffImage = imabsdiff(imageA, imageB);
imshow(diffImage, []);
drawnow;
% Write out result to result folder: same base file name, different folder.
fileNameC = fullfile(folderc, fileListA(k).name);
imwrite(diffImage, fileNameC);
end
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