How do I read images from a folder and save it in a folder ( all in a loop)

clear all
clc
%Detect objects using Viola-Jones Algorithm

imgdir = 'C:\Users\Lewis\Documents\MATLAB\testingimage';

DestDir = 'C:\Users\Lewis\Documents\MATLAB\violajones\croppedimage';

%To detect Face

FDetect = vision.CascadeObjectDetector;

images = imgdir('*.jpg');

numfiles = length(images);

myimage = cell(1,numfiles);

for k = 1:numfiles

myimage{k} = imread(images(k).name);

%Returns Bounding Box values based on number of objects

BB = step(FDetect,myimage{k});

for i = 1:size(BB,1)

      rectangle('Position',BB(i,:),'LineWidth',5,'LineStyle','-','EdgeColor','r');

      cropimage = imcrop(myimage{k},BB(i,:));
  end   
      filename = ['testingimage' ,num2str(k),'.jpg'];

      save(filename);

end

This is what I did, but I think there is some problem with it.

Answer 1

[Walter Roberson]

images = dir( fullfile(imgdir, '*.jpg') );

and

myimage{k} = imread( fullfile( imgdir, images(k).name) );

and instead of

save(filename);

use

imwrite(croppedimage, fullfile(DestDir, filename));

[Mansell Teh]

Thanks Walter, you helped out a lot !

[Walter Roberson]

To use as output the original name but with a suffix, then:

   name_suffix = '(01)';

[in_dir, in_basename, in_ext] = fileparts( images(k).name );
filename = [in_basename name_suffix in_ext];

instead of

filename = ['testingimage' ,num2str(k),'.jpg'];