I need to perform geometry matching of curves (see http://www.tiikoni.com/tis/view/?id=c54d9b8 [Broken]). As it can be seen, the big problem is that curves might be rotated, though they have similar shape. Do I need to make curve fitting and look at the parameters of analytical models? But, I guess, it's very complicated to fit these curves. How can I solve this problem? Any ideas is highly appreciable.