How can I make the code work for any format, not just .jpg?

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Hello - I found this code from http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F and although it says that any format should work, it will not read any .tif files. Instead it results in the following errors -
  • Error using imread>get_format_info (line 491)Unable to determine the file format.
  • Error in imread (line 354) fmt_s = get_format_info(fullname);
  • Error in Line (line 16) imageArray = imread(fullFileName);
There are no errors when the code is used with .jpg files. Here is the code
% function Line(~,~)
% Specify the folder where the files live.
myFolder = 'C:\Users\Vicki\Documents';
% Check to make sure that folder actually exists. Warn user if it doesn't.
if ~isfolder(myFolder)
errorMessage = sprintf('Error: The following folder does not exist:\n%s', myFolder);
uiwait(warndlg(errorMessage));
return;
end
filePattern = fullfile(myFolder, '*.tif'); % Change to whatever pattern you need.
theFiles = dir(filePattern);
for k = 1 : length(theFiles)
baseFileName = theFiles(k).name;
fullFileName = fullfile(myFolder, baseFileName);
fprintf(1, 'Now reading %s\n', fullFileName);
imageArray = imread(fullFileName);
end
end
end
Any help is much appreciated.
  3 Comments
Victoria
Victoria on 27 Jun 2018
Yes, I can open all the tif images on Photoshop or just plain photo viewer. I also tried your command and it read the tif file without a problem.
OCDER
OCDER on 27 Jun 2018
For debug, do this:
try
imageArray = imread(fullFileName);
catch
warning('Could not open: %s', fullFileName);
end
Which files are failing to open?

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Accepted Answer

Victoria
Victoria on 27 Jun 2018
Edited: Image Analyst on 28 Jun 2018
I have fixed this problem myself. For whatever reason, it was only that specific folder that wasn't opening the .tif files. All the other folders worked. Thanks for the help.
  6 Comments
Victoria
Victoria on 29 Jun 2018
These are the exact steps I took: I created a new folder, copied and then pasted my .tif files into the new folder. I use English. There were no non-English characters in it. I wish I knew why that old folder didn't work. Maybe it's because the old folder was a mix of .tif and .jpg files, but then I wouldn't understand why .jpg files would work.
Image Analyst
Image Analyst on 29 Jun 2018
No, mixing file types would not cause the problem.
Some things to try if you want,or are curious and want to avoid the problem in the future:
  1. If you move the files back into the folder of the same name (if you still have it), does the problem reoccur?
  2. If you make a folder with that name on a different drive, or as a subfolder of another folder, do you see the problem with that image file?
  3. I could try to reproduce with the same image file (if you attach it) and a folder of the same name on my computer.
Otherwise, I guess it will have to remain a mystery.

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More Answers (1)

Image Analyst
Image Analyst on 27 Jun 2018
My guess is that you really did . or * instead of *.tif and then you tried to read a non-image file. Or else the file has a .tif extension but is really NOT a tiff file. See if you can open the file in Photoshop or GIMP.
  2 Comments
Victoria
Victoria on 27 Jun 2018
Unfortunetly, I did do *.tif. I just rechecked. Additionally, I opened all the tiff files I'd like to use in this code on Photoshop and they open just fine.
Image Analyst
Image Analyst on 27 Jun 2018
Attach one or more of the tiff files that imread() cannot open.

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