Hi, With a camera, I want to film the Asian hornets (Vespa velutina) hovering in front of the hives. They expect the bees returning or leaving to catch and eat them. I do not want to track them but only detect and count them. So I filmed hornets and took many pictures from different angles. There are many detection methods with openCV and I'm a little confused. Secondly, I want to run the program on a Raspberry Pi 2. Can you advise me? Thank you