Docking drones in mid-air is easier said that done. With the rise of modular robots, midair docking is becoming quite necessary. HiPeR Lab researchers have developed a way to dock multirotors in mid-air using relative position measurements from computer vision.
The passive quadcopter localizes itself using a motion capture system and carries a marker at its bottom. The active drone localizes itself to the passive quadcopter by using the marker with its on-board camera. Sensors are used to gather the data to pull this off.