Question
Hi everyone, I'm trying to read a picture file and get the size of the picture and print it to txt file. I want it like: size img1.png 2448 3264 3 size img2.png 2458 3464 3 ........ But i don't know how to do it, please help me with the code. Here my code: for k = 1: length(jpgFiles) baseFileName = jpgFiles(k).name; fullFileName = fullfile(Folder, baseFileName); fprintf(1, 'Reading %s\n', fullFileName); imageArray = imread(fullFileName); E=size(imageArray); fid=fopen('Result.txt','a'); fprintf(fid,'%.d\n',E); fclose(fid);
Expert Answer
John Michell
PhD Expert
Answered Aug 25, 2026
fprintf(fid,'%d %d %d\n', E);
It is much faster to open the file once only:
fid = fopen('Result.txt','a');
for k = 1:length(jpgFiles)
baseFileName = jpgFiles(k).name;
fullFileName = fullfile(Folder, baseFileName);
fprintf(1, 'Reading %s\n', fullFileName);
imageArray = imread(fullFileName);
E = size(imageArray)
fprintf(fid, 'size %s\n', baseFileName); % [EDITED]
fprintf(fid, '%d %d %d\n', E);
end
fclose(fid);
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