Crowd analysis in non-static cameras using feature tracking and multi-person density

We propose a new methodology for crowd analysis by introducing the concept of Multi-Person Density. Using a state-of-the-art feature tracking algorithm, representative low-level features and their long-term motion information are extracted and combined into a human detection model. In contrast to previously proposed techniques, the proposed method takes small camera motion into account and is not affected by camera shaking. This increases the robustness of separating crowd features from background and thus opens a whole new field for application of these techniques in non-static CCTV cameras. We show the effectiveness of our approach on various test videos and compare it to state-of-the-art people counting methods.

[1]  Jean-Luc Dugelay,et al.  Low level crowd analysis using frame-wise normalized feature for people counting , 2012, 2012 IEEE International Workshop on Information Forensics and Security (WIFS).

[2]  R. Mahler Multitarget Bayes filtering via first-order multitarget moments , 2003 .

[3]  Jean-Luc Dugelay,et al.  Crowd density map estimation based on feature tracks , 2013, 2013 IEEE 15th International Workshop on Multimedia Signal Processing (MMSP).

[4]  Tom Drummond,et al.  Machine Learning for High-Speed Corner Detection , 2006, ECCV.

[5]  Tobias Senst,et al.  Robust Local Optical Flow for Feature Tracking , 2012, IEEE Transactions on Circuits and Systems for Video Technology.

[6]  Jean-Luc Dugelay,et al.  Crowd context-dependent privacy protection filters , 2013, 2013 18th International Conference on Digital Signal Processing (DSP).

[7]  N. Otsu A threshold selection method from gray level histograms , 1979 .

[8]  Nuno Vasconcelos,et al.  Privacy preserving crowd monitoring: Counting people without people models or tracking , 2008, 2008 IEEE Conference on Computer Vision and Pattern Recognition.

[9]  Mario Vento,et al.  A Method for Counting Moving People in Video Surveillance Videos , 2010, EURASIP J. Adv. Signal Process..

[10]  Bill Triggs,et al.  Histograms of oriented gradients for human detection , 2005, 2005 IEEE Computer Society Conference on Computer Vision and Pattern Recognition (CVPR'05).