MATLAB: Unable to read certain .JPG files in a folder

.jpgimread

Hello,
I am having a similar problem to this post: unable-to-read-image-jpg-file
Basically, I have a loop that uses imread to find .jpg files then applies a rotation to the image. The loop worked fine when I was testing with a small batch of images. Now, when I add new .jpg files, I get the error "Error using imread" and that certain files were not found. I tested this with 'exist' and get the output 2. Based on the documentation this means: "2 — name is a file with extension .m, .mlx, or .mlapp, or name is the name of a file with a non-registered file extension (.mat, .fig, .txt)." How can I move forward? Why are some .jpg files being read while some are not?
Here is the relevant portion of my code:
display ('top');
%Get list of all files in the folder with the desired file name pattern
filePattern = fullfile(myFolder, '*.jpg'); %find files that are .jpg
jpegFiles = dir(filePattern); %dir = list all files that match .jpg (from filePattern)
if ~isdir(myFolder)
  errorMessage = sprintf('Error: The following folder does not exist:\n%s', myFolder);
  uiwait(warndlg(errorMessage));
  return;
end
display ('before loop');
for k = 1:length(jpegFiles) %loop through all .jpg files
    display ('inside loop');
    baseFileName = jpegFiles(k).name; %name of .jpgs (indexed individually (k)); Ex: SDC10705_RS.jpg
    fullFileName = fullfile(myFolder, baseFileName); %fullfile builds filename from parts = myfolder\baseFileName (full path of ^)
    fprintf(1, 'Now reading %s\n', fullFileName); 
    imageArray = imread(fullFileName); %read specific FULLfilename from store of .jpg files
                                       %this should be the full
      %Rotate                                   
      display ('rotation');
      %raw= jpegFiles(k).name;
      I = imread(jpegFiles(k).name); %must have imread for next step to work (rotation of I)
      R = imrotate(I, 355, 'bicubic'); %put angle and type of rotation here. 'bicubic' works best/ least distortion                           
      imshow(R); %display image
      %drawnow; %force display to update immediately
      %Break up fileparts to allow saving with '_rotate' extension when looping through files
      [tmp_path, tmp_name, tmp_ext] = fileparts(fullFileName); %separating fullFileName, into path, name, and ext (.jpg) (pretty much opposite of fullfile)
                                                               %need to do this so .jpg is at the end
      fullFileName_rotate = [tmp_path, filesep, tmp_name, '_rotate',tmp_ext];
      imwrite(R, fullFileName_rotate); %new rotated image
                                       %saved as filename_rotate
end;
Thank you.

Best Answer

Most likely, the line

imageArray = imread(fullFileName); %read specific FULLfilename from store of .jpg files

works fine for all the files. However, you're getting an error with the next imread:

I = imread(jpegFiles(k).name);

because that one looks for the file in the local folder instead of myFolder.

I = imread(fullFileName);

would fix the issue, but I don't see the point of reloading an image that you've already loaded in memory, so the simplest is to get rid of that imread and use the existing imageArray instead of I in the next line:

R = imrotate(imageArray, 355, 'bicubic'); %put angle and type of rotation here. 'bicubic' works best/ least distortion
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