Isolate element during video record to get 3d location


Hi guys. If I made a video record with a drone, how could I isolate an object during this record (for example a type of car) not to model it but rather to know the location of this car in a 3d space. Could I achieve this by placing some type of light (for example fluorescent) or some source of heat and then making a lighting or heat filter on the image to isolate that element?
How could i achieve this?

Thank’s a lot.