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The Scientific World Journal
Volume 2014, Article ID 140930, 17 pages
Research Article

Analysis of Infrared Signature Variation and Robust Filter-Based Supersonic Target Detection

1Yeungnam University, Gyeongsan-si, Gyeongsangbuk-do 712-749, Republic of Korea
2Agency for Defense Development, 111 Sunam-dong, Daejeon 305-152, Republic of Korea
3Electromagnetic Technology Laboratory, POSTECH, Pohang 790-784, Republic of Korea

Received 22 August 2013; Accepted 17 November 2013; Published 11 February 2014

Academic Editors: S. Bourennane and J. Marot

Copyright © 2014 Sungho Kim et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The difficulty of small infrared target detection originates from the variations of infrared signatures. This paper presents the fundamental physics of infrared target variations and reports the results of variation analysis of infrared images acquired using a long wave infrared camera over a 24-hour period for different types of backgrounds. The detection parameters, such as signal-to-clutter ratio were compared according to the recording time, temperature and humidity. Through variation analysis, robust target detection methodologies are derived by controlling thresholds and designing a temporal contrast filter to achieve high detection rate and low false alarm rate. Experimental results validate the robustness of the proposed scheme by applying it to the synthetic and real infrared sequences.