Facing problem in saving the images in folder

I need some help in my code. I am trying to read the images from a folder and detect faces from then and save the cropped images in another folder. But while running the code it is not saving the cropped images into the folder properly. It's overwriting the images.

HER IS THE CODE

Folder = 'OUTPUT';
FileList = dir(fullfile(Folder, '*.jpg'));
for iFile = 1:numel(FileList)
File = fullfile(Folder, FileList(iFile).name);
I = imread(File);
% figure(1),imshow(I);
FaceDetect = vision.CascadeObjectDetector; 
BB = step(FaceDetect,I);
% figure(2),imshow(I);
for i = 1:size(BB,1)
rectangle('Position',BB(i,:),'LineWidth',3,'LineStyle','-','EdgeColor','r');
end
for i = 1:size(BB,1)
J= imcrop(I,BB(i,:));
M = imresize(J,[48 48]);
imgray=rgb2gray(M);
fname = sprintf('%06d.jpg',i);
fpath = fullfile('Fdetected', fname);
imwrite(imgray,fpath);
end
end

Answer 1

[Balakrishnan Rajan]

The 'fname' line of your code:

fname = sprintf('%06d.jpg', i);

should be in the outer most for loop. Then the 'i' will correspond to different input images. Presently, it seems to be another intermediate variable used for cropping the image.

[Balakrishnan Rajan]

Along with the following lines of course.

[saeeda saher]

Thank You, Will you please guide me through editing my code? I tried but its not working

[Balakrishnan Rajan]

I think something along the lines of:

Folder = 'OUTPUT';
FileList = dir(fullfile(Folder, '*.jpg'));
for iFile = 1:numel(FileList)
    File = fullfile(Folder, FileList(iFile).name);
    I = imread(File);
    % figure(1),imshow(I);
    FaceDetect = vision.CascadeObjectDetector; 
    BB = step(FaceDetect,I);
    % figure(2),imshow(I);
    for i = 1:size(BB,1)
        rectangle('Position',BB(i,:),'LineWidth',3,'LineStyle','-','EdgeColor','r');
    end
    for i = 1:size(BB,1)
        J= imcrop(I,BB(i,:));
        M = imresize(J,[48 48]);
        imgray=rgb2gray(M);
    end
    fname = sprintf('%06d.jpg',iFile);
    fpath = fullfile('Fdetected', fname);
    imwrite(imgray,fpath);
end

Also run MATLAB as administrator. Create the folder 'Fdetected' beforehand. I think thats it.

Also remember to change it to 'iFile' when placing the lines outside as the iterator for the outermost loop is 'iFile' in your case.