Obstacles no problem for smart robots

Normally, students and scientists walk here, but today a drone is flying through a corridor on TU Delft Campus. Seemingly effortlessly, it whizzes past and between a variety of obstacles: rubbish bins, stacked boxes and poles. But then suddenly a person appears, walking straight towards the drone in the same space. This is not a stationery object but an actual moving person. 'This is much more difficult for the drone to process.