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

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Victoria
Victoria 2018-6-27
评论： Image Analyst 2018-6-29
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.
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Victoria
Victoria 2018-6-27
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 2018-6-27
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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采纳的回答

Victoria
Victoria 2018-6-27
编辑：Image Analyst 2018-6-28
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.
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Victoria
Victoria 2018-6-29
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 2018-6-29
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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更多回答（1 个）

Image Analyst
Image Analyst 2018-6-27
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 个评论
Victoria
Victoria 2018-6-27
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 2018-6-27
Attach one or more of the tiff files that imread() cannot open.

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