This paper proposes a real-time system capable to extract andmodel object trajectories from a multi-camera setup with theaim of identifying abnormal paths. The trajectories are modeledas a sequence of positional distributions (2D Gaussians)and clustered in the training phase by exploiting an innovativedistance measure based on a global alignment techniqueand Bhattacharyya distance between Gaussians. An on-lineclassification procedure is proposed in order to on-the-fly classifynew trajectories into either “normal” or “abnormal” (in thesense of rarely seen before, thus unusual and potentially interesting).Experiments on a real scenario will be presented.
A Real-Time System for Abnormal Path Detection / Calderara, Simone; C., Alaimo; Prati, Andrea; Cucchiara, Rita. - ELETTRONICO. - 2009:2(2009), pp. 1-6. (Intervento presentato al convegno 3rd International Conference on Imaging for Crime Detection and Prevention, ICDP 2009 tenutosi a London, gbr nel 3 December 2009) [10.1049/ic.2009.0251].
A Real-Time System for Abnormal Path Detection
CALDERARA, Simone;PRATI, Andrea;CUCCHIARA, Rita
2009
Abstract
This paper proposes a real-time system capable to extract andmodel object trajectories from a multi-camera setup with theaim of identifying abnormal paths. The trajectories are modeledas a sequence of positional distributions (2D Gaussians)and clustered in the training phase by exploiting an innovativedistance measure based on a global alignment techniqueand Bhattacharyya distance between Gaussians. An on-lineclassification procedure is proposed in order to on-the-fly classifynew trajectories into either “normal” or “abnormal” (in thesense of rarely seen before, thus unusual and potentially interesting).Experiments on a real scenario will be presented.Pubblicazioni consigliate
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