MATLAB: How to store multiple image vectors into matrix rows

Deep Learning Toolboxdimension missmatchimage vectorvector to image

Hi all, I have a folder which contains 200 BMP images, I am reading all the images, converting each image into a vector and then trying to store these image vectors into a matrix. Following is the code which is self-explanatory, though it looks quite right however when i run the script it give me the following error. Subscripted assignment dimension mismatch.
Error in Readallimages (line 16) immat(437580,k)=imtovector
    myFolder = 'C:\Users\Sana\Desktop\DermoscopyImages';
if ~isdir(myFolder)
  errorMessage = sprintf('Error: The following folder does not exist:\n%s', myFolder);
  uiwait(warndlg(errorMessage));
  return;
end
filePattern = fullfile(myFolder, '*.bmp');
bmpFiles = dir(filePattern);
immat=zeros(437580,200);
for k = 1:length(bmpFiles)
  baseFileName = bmpFiles(k).name;
  fullFileName = fullfile(myFolder, baseFileName);
  fprintf(1, 'Now reading %s\n', fullFileName);
  imageArray = rgb2gray(imread(fullFileName));  %Read image and convert to Gray 
  imtovector=double(imageArray(:));             %convert 2D image into 1D vector
  immat(437580,k)=imtovector                    %Store image vectors into matrix
  imshow(imageArray);  % Display image.
  drawnow; % Force display to update immediately.
end
Any sort of help in this regard would be highly appreciated. Thanks in advance

Best Answer

You may run out of memory. Why do you think you need to do this? You may not have to. You may be able to just read in and process one image at a time.
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