This is a project demonstrating what is necessary implement a Sudoku grabber and solver using the OpenCV Java API.
This project comprises a JavaFX and an Android implementation, you can check out the APK here.
Maybe you want to read some blog posts about this project at http://ladstatt.blogspot.com/.
SudokuFX uses maven as build tool. One dependency is opencv 3.1, which you will have to deploy yourself in your local repository. See INSTALL.txt.
Apache License 2.0