MATLAB: Importing multiple jpg files using imread. File format error.

.jpgerrorimread

Recently created a subset of script to import a number of .jpg files by putting them in a loop. This script has been working perfectly for me, until today. I've not changed anything and have tried this both on my personal PC and University PCs, and still get the same error.
I got the information for the script from this link and followed it exactly. http://uk.mathworks.com/help/matlab/import_export/process-a-sequence-of-files.html
My script looks like this:
jpegFiles = dir('*.jpg'); 
numfiles = length(jpegFiles);
images = cell(1, numfiles);
for k = 1:numfiles 
  images{k} = imread(jpegFiles(k).name); 
end
Previously, as I mentioned, there have been no problems. I now suddenly get this error, and have tried all I can think of!
Error using imread (line 362)
Unable to determine the file format.
Error in imagesin (line 6)
  images{k} = imread(jpegFiles(k).name);
I am new to this and any suggestions would be appreciated!
Thanks in advance.

Best Answer

One of your files has a .jpg suffix but is not a valid JPEG file. Try
jpegFiles = dir('*.jpg'); 
numfiles = length(jpegFiles);
images = cell(1, numfiles);
for k = 1:numfiles
  thisfile = jpegFiles(k).name;
  try 
    images{k} = imread(thisfile);
  catch
    warning('File #%d, name "%s" does not appear to be a valid image, skipping it. The file size for it is %d bytes', k, thisfile, jpegFiles(k).bytes );
    images{k} = uint8([]);
  end
end
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