MATLAB: How to run m-files automatically

loop over file names

Hi,

I have collection of images to analyze using matlab. I made m-file code to analyze one image at a time, but it takes considerable time as there are hundreds of images to run.

Is there anyway to call the files in the folder and run one at a time automatically, without me designating the file name one by one?

Thank you very much for help.

Best Answer

D = dir('*.jpg');
for ii = 1:length(D)
   % Put your processing code here. Call image names as below...
   fprintf('Processing image named %s\n',D(ii).name);
end

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MATLAB: How to use different file format in MATLAB

Just get all the files in the directory and keep only the ones with the extensions you want. You could even get the list of all valid image extension from imformats:

%option 1:
extensions = {'bmp', 'tif', jpg'}; %define allowed extensions yourself
%option 2:
registry = imformats; %get all image type supported by matlab
extensions = [registry.ext]; %and get their extensions
allfiles = dir(fullfile(somepath, '*.*')); 
isimage = arrayfun(@(f) ~f.isdir && any(strcmp(regexp(f.name, '\.(.*)$', 'tokens', 'once'), extensions')), allfiles);
imagefiles = allfiles(isimage);
for imagefile = imagefiles'
    Im = imread(fullfile(somepath, imagefile.name));
    ...
end

MATLAB: Super simple problem with imread

The problem is that you're not prepending the folder to the base file name so it will look only in the current folder (of your m-file) or on the search path. To have it find the file that is not there, you must give the full file name by prepending the folder.

And do NOT use path as the name of your folder since it's the name of a very improtant built-in variable.

folder = 'C:\Users\chris\Documents\Homework\ThermoFluids\Sphere Drag\Orange1_C001H001S0001';
fileList = dir(fullfile(folder, '/*.tif'));
fullFileName = fullfile(fileList(1).folder, fileList(1).name)
picture = imread(fullFileName);
imshow(picture);

Best Answer

Related Solutions

MATLAB: How to use different file format in MATLAB

MATLAB: Super simple problem with imread

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