[20713002]

RGB = imread('gantrycrane.png');
imshow(RGB);

text(size(RGB,2),size(RGB,1)+15,'Image courtesy of Jeff Mather',...
'FontSize',7,'HorizontalAlignment','right');

line([300 328],[85 103],'color',[1 1 0]);
line([268 255],[85 140],'color',[1 1 0]);

text(150,72,'Measure the angle between these beams','Color','y',...
'FontWeight', 'bold');

Attempt to execute SCRIPT image as a function.
谢啦！