How to use "cpselect" funtion for a folder image and save parameters it?

Hi guys;

I want to detect the corners of between the checkerboard and all of the images in a specific folder and save their parameters separately.

image_folder='E:\Homography-for-Linear-Image-Transformation-master\images of cailbration';
filenames = dir(fullfile(image_folder,'*.jpg'));
total_images = numel(filenames);
  
for n = 1:total_images
 f= fullfile(image_folder, filenames(n).name);
 images_camera = imread(f);
end
 
J = checkerboard(800);
J = J>0.5;
imwrite(J,'checkerboard400.jpg');


%% Obtain the main points in images

for n = 1:total_images
  [selectedMovingPoints,selectedFixedPoints]= cpselect(f,J,'Wait',false);
     save(sprintf('Homography_Matrice%n.mat','selectedMovingPoints%n','selectedFixedPoints%n',n));
end