Can you please post these questions on the course forum and I will address them all on this link https://www.udemy.com/ros-essentials/learn/v4/questions Thanks --- [Visit Topic](https://discourse.ros.org/t/learn-opencv-in-ros-for-beginners-in-my-udemy-course/5404/5) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: