Hi Steven, Yes i can get the estimation matrix but i am not sure how to do this: http://www.ros.org/wiki/robot_pose_ekf/Tutorials/AddingGpsSensor (Instead of GPS i want to add a camera) Any guidance on the same line? Abhy -- View this message in context: http://ros-users.122217.n3.nabble.com/Camera-input-to-EKF-tp2484301p2485498.html Sent from the ROS-Users mailing list archive at Nabble.com.