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Proceedings Paper

Real-time classification of vehicles by type within infrared imagery
Author(s): Mikolaj E. Kundegorski; Samet Akçay; Grégoire Payen de La Garanderie; Toby P. Breckon
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Paper Abstract

Real-time classification of vehicles into sub-category types poses a significant challenge within infra-red imagery due to the high levels of intra-class variation in thermal vehicle signatures caused by aspects of design, current operating duration and ambient thermal conditions. Despite these challenges, infra-red sensing offers significant generalized target object detection advantages in terms of all-weather operation and invariance to visual camouflage techniques. This work investigates the accuracy of a number of real-time object classification approaches for this task within the wider context of an existing initial object detection and tracking framework. Specifically we evaluate the use of traditional feature-driven bag of visual words and histogram of oriented gradient classification approaches against modern convolutional neural network architectures. Furthermore, we use classical photogrammetry, within the context of current target detection and classification techniques, as a means of approximating 3D target position within the scene based on this vehicle type classification. Based on photogrammetric estimation of target position, we then illustrate the use of regular Kalman filter based tracking operating on actual 3D vehicle trajectories. Results are presented using a conventional thermal-band infra-red (IR) sensor arrangement where targets are tracked over a range of evaluation scenarios.

Paper Details

Date Published: 24 October 2016
PDF: 16 pages
Proc. SPIE 9995, Optics and Photonics for Counterterrorism, Crime Fighting, and Defence XII, 99950T (24 October 2016); doi: 10.1117/12.2241106
Show Author Affiliations
Mikolaj E. Kundegorski, Durham Univ. (United Kingdom)
Samet Akçay, Durham Univ. (United Kingdom)
Grégoire Payen de La Garanderie, Durham Univ. (United Kingdom)
Toby P. Breckon, Durham Univ. (United Kingdom)

Published in SPIE Proceedings Vol. 9995:
Optics and Photonics for Counterterrorism, Crime Fighting, and Defence XII
Douglas Burgess; Gari Owen; Henri Bouma; Felicity Carlysle-Davies; Robert James Stokes; Yitzhak Yitzhaky, Editor(s)

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