How to use different file format in MATLAB

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Hi there,
I was using same file format (.tif) as input while processing with my following code. However, I have got new images with other formats like jpg, bmp.
I was previously using the below line and every time I need to change the extension manually in
M = dir(fullfile(imgPath,'*.tif'));
to work with different extension.
In most cases in one folder of the file extensions are different it only works with .tif and ignore others.
Any advice will be highly appreciated.

Accepted Answer

Guillaume
Guillaume on 21 Oct 2014
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
  1 Comment
Siam
Siam on 21 Oct 2014
Edited: Siam on 21 Oct 2014
Now I can process using the second option for my images and it is working.
Thank you very much.

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More Answers (1)

Image Analyst
Image Analyst on 21 Oct 2014
Try this snippet:
ImageFiles = dir([handles.imageFolder '\*.*']);
for Index = 1:length(ImageFiles)
baseFileName = ImageFiles(Index).name;
[folder, name, ext] = fileparts(baseFileName);
ext = upper(ext);
if strcmpi(name, 'contours')
continue;
end
% Allow only tif, JPG, PNG, or BMP
if strcmpi(ext, '.TIF') == 1 || strcmpi(ext, '.JPG') == 1 || strcmpi(ext, '.TIF') == 1 if strcmp(ext, '.PNG') == 1
% if strcmp(baseFileName, '.') == 0 && strcmp(baseFileName, '..') == 0 && strcmp(baseFileName, 'Thumbs.db') == 0
ListOfImageNames = [ListOfImageNames baseFileName];
end
end
  5 Comments
Image Analyst
Image Analyst on 24 Oct 2014
You're welcome. As you figured out folder is just your directory, which you called imgPath, so it's
tiffFiles = dir(fullfile(imgPath, '*.tif'))
pngFiles = dir(fullfile(imgPath, '*.png'))
jpgFiles = dir(fullfile(imgPath, '*.jpg'))
bmpFiles = dir(fullfile(imgPath, '*.bmp'))
allImageFiles = [tiffFiles; pngFiles; jpgFiles; bmpFiles]
If you like the code, you can "Vote" for my answer.
Siam
Siam on 11 Nov 2014
Sorry for the delay Image Analyst. This one also works. Great help. Ty.

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