how to write multiple images into a folder

I have this code

[parentFolder deepestFolder] = fileparts('24x24');
output_folder = 'E:\Bismillah Wisuda 115\progress TA ku new\program';

for a=1:40
    im=imread(['E:\Bismillah Wisuda 115\progress TA ku new\program\data training\citra training positif2\kendaraan' num2str(a) '.jpg']);
    image=imresize(im,[24 24]);
    imwrite(image,['kendaraan' num2str(a) '.jpg'],'jpg');
    newSubFolder = sprintf(deepestFolder);
    fullname = fullfile(output_folder,'output_folder',newSubFolder);
    if ~exist(parentFolder, 'dir')
       mkdir(parentFolder);
    end
end

it can run, but my folder is still empty. Can you please fix it? Thank you.

Answer 1

[Geoff Hayes]

Tuffahatul - it isn't clear why there is a command to create a parentFolder. Is this where you intend to put the new images? Or is this intended for something else?

Your don't supply a path as to where you want to write the files when calling imwrite

 imwrite(image,['kendaraan' num2str(a) '.jpg'],'jpg');

so I suspect that the files are being copied into some other directory perhaps along the MATLAB search path. If there is a location where you want to write the file to, then you need to be explicit about it. For example,

 myImage = imresize(im,[24 24]);
 outputFileName = fullfile(output_folder, ['kendaraan' num2str(a) '.jpg']);
 imwrite(myImage, outputFileName);

So we resize the image and then create the file name and path where we want to write the resized image to. Note how I have replaced your local variable image with myImage. image is a built-in MATLAB function, so it is never a good idea to name a local variable that has the same name as a built-in function.

Answer 2

[Image Analyst]

That code is not very robust at all. I can see at least 3 or 4 problems right off the bat. See the FAQ for two ways that it can be done. http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F