How to store multiple image vectors into matrix rows?
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
Neeta Dsouza answered .
2025-11-20
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.