Vision Algorithms: Behaviour Recognition

Exit zone

• Recognition of a Group behaviour: “A Group of people blocks an Exit”  based on a Finite state automaton

INIT

Grp x is tracked

Grp x is  inside a ZOI

Grp X is stopped in the ZOI > 30 sec

Enter_ZOI

Exit_ZOI

Exit_ZOI

« Blocking »

Stops

Start_walking

Start_running

*

26/02/2003 IDSS

 

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Notes:

Let me now show you a recognition result for this scenarion.

This is a metro sequence . The blocking zone defined in the scene model is overlayed on the image.

So first we can see a group of people tracked by the Long Term Group Tracker walking (characterised by the green/blue box), the mobile objects are also displayed and characterised by bbox red for the class person and green for the class group. then this group goes inside the Exit zone and stop in it.

The group carry on being stopped and thus the final automaton-state will be reached.