An approach to automatic detection of suspicious individuals in a crowd

Stephen Lucci; Satabdi Mukherjee; Izidor Gertner

doi:10.1117/12.2182671

22 May 2015 An approach to automatic detection of suspicious individuals in a crowd

Stephen Lucci, Satabdi Mukherjee, Izidor Gertner

Proceedings Volume 9476, Automatic Target Recognition XXV; 94760C (2015) https://doi.org/10.1117/12.2182671
Event: SPIE Defense + Security, 2015, Baltimore, MD, United States

Abstract

This paper describes an approach to identify individuals with suspicious objects in a crowd. To accomplish this goal we define criteria for a suspicious individual we are searching for. The query image is declared to contain a suspicious individual if it satisfies these criteria. In our implementation we apply a well-known algorithm suite used in image retrieval, mobile visual search problems where the reference data base of images is stored in a hierarchical tree data structure. In many cases, the construction of such a hierarchical tree uses k-means clustering followed by geometric verification. However, the number of clusters is not known in advance, and sometimes it is randomly generated. This may lead to congested clustering which can cause problems in grouping large real-time data. To overcome this problem, in this work, we estimate the number of clusters using the Indian Buffet stochastic process. We present examples illustrating our method.

Citation Download Citation

Stephen Lucci, Satabdi Mukherjee, and Izidor Gertner "An approach to automatic detection of suspicious individuals in a crowd", Proc. SPIE 9476, Automatic Target Recognition XXV, 94760C (22 May 2015); https://doi.org/10.1117/12.2182671

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