Not able to read all the images into matlab

clear all
clc
folder = 'C:/all_video_frames/';
filename = dir(fullfile(folder, '*.jpg'));
for i = 1:numel(filename)
    f=fullfile(folder,filename(i).name);
    img=imread(f);
    figure(1),imshow(img)
    gray_image = rgb2gray(img);
    figure(2), imshow(gray_image)
    resized_image=imresize(gray_image,[25,25]);
    figure(3),imshow(resized_image)
    path=strcat('C:/images25/', filename(i).name);
    imwrite(resized_image, path);
end

Read images folder has images like:

Subject1-Frame1.jpg, Subject2-Frame2.jpg so on

Subject2-Frame2.jpg, Subject2-Frame2.jpg so on

Having 40 subjects in total

Output images coming as: Subject1-Frame1.jpg, Subject1-Frame10.jpg, Subject1-Frame100.jpg,Subject2-Frame1000.jpg, Subject1-Frame1001.jpg so on.

Missing many images.

How can I get all the images? Please help.

[per isakson]

First see: Debug a MATLAB Program.

Step through the the script and inspect the values of critical variables. Does folder has the expected value? Etc.

[Geoff Hayes]

Parminder - are the images missing or just not appearing in the order that you are expecting? I suspect that you will see files in the order of 1,10,100,1000,1001,....,2,20,200,2000,2001,...., 3,30, 300,3000,3001, ... etc.