Interpreting Suspicious and Coordinated Behavior in a Sensor Field
| dc.contributor.author | Rowe, Neil C. | |
| dc.date | August 2008 | |
| dc.date.accessioned | 2013-09-18T18:39:47Z | |
| dc.date.available | 2013-09-18T18:39:47Z | |
| dc.date.issued | 2008-08 | |
| dc.description | This paper appeared in the Proceedings of the Meeting of the Military Sensing Symposium Specialty Group on Battlespace Acoustic and Seismic Sensing, Magnetic and Electric Field Sensors, Laurel, MD, August 2008. | en_US |
| dc.description.abstract | We report on recent work we have done on detection of two kinds of militarily interesting behavior in an urban battlespace, detection of suspicious behavior and detection and classification of coordinated movements of groups of people. The first is important in detecting terrorism and IED emplacement, and the second is important in detecting military adversaries and what they are doing. Our approaches use only "pose" information, the locations and orientations of people within the sensor field, as extracted from tracking by a fusion of various nonimaging sensing modalities. Restriction to nonimaging sensors saves money, and restriction to pose information avoids most of the serious privacy concerns. We first explain our approach to tracking using signal strengths alone. From experiments with both staged and nonstaged behavior in a public area, we found that the most useful clue to suspicious behavior was the norm of the acceleration vector averaged over several different time scales. With detection and classification of groups of people, by contrast, no single metric was as good as combinations of metrics. We are exploring a variety including average distances between people, uniformity of distances, linearity of the positions of people, number of clusters of people, number of directions in which they can see, overall visibility, average speed of the group, and uniformity of the speed of the group. A key challenge is to make these metrics scale-free as with the acceleration vector analysis. | en_US |
| dc.description.distributionstatement | Approved for public release; distribution is unlimited. | |
| dc.description.sponsorship | supported in part by the National Research Council under their Research Associateship Program at the Army Research Laboratory, in part by the National Science Foundation under the EXP Program, and in part by the BASE-IT Project sponsored by the Office of Naval Research | en_US |
| dc.identifier.uri | https://hdl.handle.net/10945/36470 | |
| dc.publisher | Monterey, California. Naval Postgraduate School | en_US |
| dc.title | Interpreting Suspicious and Coordinated Behavior in a Sensor Field | en_US |
| dc.type | Conference Paper | en_US |
| dspace.entity.type | Publication |
