How to implement RANSAC algorithm and kalman filter or particle filter with ROS packages

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I'd like to implement those algorithms by using ROS packages to solve one way the SLAM problem. I know that gmapping, Rviz, slam_gmapping and robot_pose_ekf (for extended kalman filter) could be useful packages, but I'm kind of lost. I don't ask a tutorial because the next days I'm going to start studying deeper this subject, but I need orientation in the procedure.

"a possible way to implement RANSAC algorithm" http://pointclouds.org/documentation/...

Thanks in advance

Thanks in advance