Paper
29 February 2000 Adaptive matched filtering for the varying attitude of a target
Jinchun Wang, Joohwan Chun, Yong Woon Park
Author Affiliations +
Proceedings Volume 3968, High-Speed Imaging and Sequence Analysis II; (2000) https://doi.org/10.1117/12.378877
Event: Electronic Imaging, 2000, San Jose, CA, United States
Abstract
The target detection can be carried out with a statistical matched filter. The construction of the matched filter needs the information on the background clutter statistics as well as on the shape of the target. In military IR search and tracker systems, the intensity of the target is usually assumed to have the 2D Gaussian shape. This Gaussian assumption is valid only for a head-on approaching missile in the far distance. More often than not, however, the homing enemy missile takes the 'lead angle' trajectory, and the IR target shape may be an ellipse with a time-varying eccentricity. In such a case, the matched filter tuned to the Gaussian-shaped target either fails to detect the target, or result in a high false alarm rate. To overcome this difficulty, we propose a new extended-target detection algorithm which can adapt to the time-varying target shapes. We estimate the attitude of the target using an extended Kalman filter from a sequence of image frames. The estimated target attitude is, then used to predict the projected shape of the target image. Using the predicted target shape, we can construct a better-tuned matched filter for the detection of the target in the next image frame. The proposed algorithm has been tested with 8-12 micrometers IR image frames, and we observe that the false alarm rate has ben reduced by the order of magnitude in comparison with the simple method filtering method with the Gaussian-shaped target assumption.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jinchun Wang, Joohwan Chun, and Yong Woon Park "Adaptive matched filtering for the varying attitude of a target", Proc. SPIE 3968, High-Speed Imaging and Sequence Analysis II, (29 February 2000); https://doi.org/10.1117/12.378877
Advertisement
Advertisement
RIGHTS & PERMISSIONS
Get copyright permission  Get copyright permission on Copyright Marketplace
KEYWORDS
Target detection

Optical filters

Image filtering

Missiles

Detection and tracking algorithms

Digital filtering

Electronic filtering

RELATED CONTENT


Back to Top