Object Length measurement form an image

I want to measure the lengths(X,Y,L,L1,L2,L3) of following picture by image processing. How can measure this length. is it possible to measure this length automatically

Please give me some direction that can i follow to solve my problem

Thanks in advance

[sazzad hossen]

link of this image

http://tinypic.com/view.php?pic=2jcyue&s=8#.U1dqKVWSyPQ