Figure 6
From: Pedestrian tracking with an infrared sensor using road network information

Estimated paths for three pedestrians. Start locations (where the pedestrians were first observed) are marked with a square. Pedestrian 1 is walking toward south on a walkway, but is suddenly going off-road. Pedestrian 2 starts off-road, but eventually approaches a walkway moving north. Pedestrian 3 is on the walkway for the whole sequence.