Attention: In the meantime the code is hosted here: https://github.com/rladstaetter/net.ladstatt
This is a project demonstrating what is necessary implement a sudoku grabber and solver using the OpenCV Java API.
Maybe you want to check out a blog post series about this project at http://ladstatt.blogspot.com/ for a more detailled discussion of the used concepts.
Make sure you have openCV installed and changed the path in the scala source code to the correct DLL or lib on your system.