ginput2

clear
close all

filename = '2018-01-31_17-16-46.JPG';
rgb = imread(filename);

do_input = false;
clear pts
if do_input
    imshow(rgb);
    beep;
    pause;
    pts(1,:) = ginput(1);
    beep;
    pause;
    pts(2,:) = ginput(1);
    save data2 pts
else
    load data2
end

format shortg
pts

imshow(rgb);
hold on
plot(pts(:,1),pts(:,2),'b','LineWidth',2);
plot(pts(:,1),pts(:,2),'yo','MarkerSize',9);
hold off

pts =

       1797.2       1086.2
         2352       1063.9

Warning: Image is too big to fit on screen; displaying at 25%