images_to_heartpulses/ROI.m

for i = 100:1000
  image_path = imread(sprintf('frame2_%d.jpg', i));
  [rows, columns, channels] = size(image_path);
  roi = image_path(90:150, 300:400, :);
  imwrite(roi, (sprintf('frames/my_imagev2%d.jpg',i)));
end