Directing Cinematographic Drones

International audienceQuadrotor drones equipped with high quality cameras have rapidly raised as novel, cheap and stable devices for filmmakers. While professional drone pilots can create aesthetically pleasing videos in short time, the smooth – and cinematographic – control of a camera drone remains challenging for most users, despite recent tools which either automate part of the process or enable the manual design of waypoints to create drone trajectories. This paper moves a step further by offering a high-level control of cinematographic drones for the specific task of framing dynamic targets. We propose techniques to automatically and interactively plan quadrotor drone motions in dynamic 3D environments while satisfying both cinematographic and physical quadrotor constraints. We first propose the Drone Toric Space, a dedicated camera parameter space with embedded constraints, and derive some intuitive on-screen viewpoint manipulators. Second, we propose a dedicated path planning technique which ensures both that cinematographic properties can be enforced along the path, and that the path is physically feasible by a quadrotor drone. At last, we build on the Drone Toric Space and the specific path planning technique to coordinate the motion of multiple drones around dynamic targets. A number of results demonstrate the interactive and automated capacities of our approaches on different use-cases