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Sensors 2015, 15(4), 7267-7293; doi:10.3390/s150407267

High-Speed Incoming Infrared Target Detection by Fusion of Spatial and Temporal Detectors

Yeungnam University, 280 Daehak-Ro, Gyeongsan, Gyeongbuk 712-749, Korea
Academic Editor: Robert H. Hadfield
Received: 14 January 2015 / Revised: 13 March 2015 / Accepted: 20 March 2015 / Published: 25 March 2015
(This article belongs to the Special Issue Frontiers in Infrared Photodetection)

Abstract

This paper presents a method for detecting high-speed incoming targets by the fusion of spatial and temporal detectors to achieve a high detection rate for an active protection system (APS). The incoming targets have different image velocities according to the target-camera geometry. Therefore, single-target detector-based approaches, such as a 1D temporal filter, 2D spatial filter and 3D matched filter, cannot provide a high detection rate with moderate false alarms. The target speed variation was analyzed according to the incoming angle and target velocity. The speed of the distant target at the firing time is almost stationary and increases slowly. The speed varying targets are detected stably by fusing the spatial and temporal filters. The stationary target detector is activated by an almost zero temporal contrast filter (TCF) and identifies targets using a spatial filter called the modified mean subtraction filter (M-MSF). A small motion (sub-pixel velocity) target detector is activated by a small TCF value and finds targets using the same spatial filter. A large motion (pixel-velocity) target detector works when the TCF value is high. The final target detection is terminated by fusing the three detectors based on the threat priority. The experimental results of the various target sequences show that the proposed fusion-based target detector produces the highest detection rate with an acceptable false alarm rate. View Full-Text
Keywords: incoming target; target detection; stationary and moving; spatial and temporal; detector fusion; threat priority incoming target; target detection; stationary and moving; spatial and temporal; detector fusion; threat priority
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. (CC BY 4.0).

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Kim, S. High-Speed Incoming Infrared Target Detection by Fusion of Spatial and Temporal Detectors. Sensors 2015, 15, 7267-7293.

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