Crowd counter

Crowd counter is a piece of software able to track moving features within a video clip. It works on the assumption that points that move together are most likely part of the same entity within the crowd. Another version of the crowd counter uses information about the direction of individuals' movement to estimate where they are looking.

videos: bees inside hive | subway station | open area | another one

Via: newscientisttech.com | related post: human swarms