Is there an easy way/algorithm to match 2 clouds of 2D points?

Question

I am wondering if there is an easy way to match (register) 2 clouds of 2d points.

Let\'s say I have an object represented by points and an cluttered 2nd image with t

Answer 1

I believe you are looking for something like David Lowe's SIFT (Scale Invariant Feature Transform). Other option is SURF (SIFT is patent protected). The OpenCV computer library presents a SURF implementation