Aruco is generally ROS and used as Copter Precision Landing, here is from our wiki
https://ardupilot.org/dev/docs/ros-aruco-detection.html
And this BLOG based on April Tag
Aruco is generally ROS and used as Copter Precision Landing, here is from our wiki
https://ardupilot.org/dev/docs/ros-aruco-detection.html
And this BLOG based on April Tag