Untitled

imshow(imgOriginal); 

hold on; 

for i = 1:4
    j = mod(i,4) + 1;    
    
    plot([rectifiedPoints(i,1) rectifiedPoints(j,1)], ... 
         [rectifiedPoints(i,2) rectifiedPoints(j,2)], ...
         'g-', ...           
         'LineWidth', 2);    
end

for i = 1:4
    text(rectifiedPoints(i,1), rectifiedPoints(i,2), ... 
         num2str(i), 'Color', 'white', 'FontSize', 12);
end