Circular Hough Transform

[cs02rm0]

I'm looking for a _simple_ implementation of this, starting with a BufferedImage in Java, although really I'd take any language. I don't want to deal with separating it from GUI code, etc - I'm not concerned about it being 'optimised' in any way - I just want the basic stuff to play with and get a feel for.

I'm aware of various applets, etc, but I've had difficulties trying to strip them down to the core algorithm so I'd be really grateful if someone could find me a very clean example. :)

Thanks