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Optical Engineering

Realistic matched filter performance prediction for hyperspectral target detection
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Paper Abstract

The linear matched filter is widely used in hyperspectral target detection applications. Its detection performance is typically evaluated based on Gaussian (or normal) probability density models. However, it is well known that hyperspectral backgrounds exhibit "long-tail" behavior, which cannot be accurately modeled by normal distributions. In this work, we model the distribution of hyperspectral backgrounds using a more accurate model based on elliptically contoured multivariate t distributions. For the target class, we still use a normal distribution model, because the body of the distribution is important for detection applications. We show that the tails of the background distribution deteriorate the performance of the matched filter. In this sense, performance predictions based exclusively on normal models, which ignore the long tails, can be inaccurate and overly optimistic. The proposed technique, which allows for an easy control of the tail's heaviness, can be a very useful tool for evaluating target detection performance for backgrounds with both light and heavy tails.

Paper Details

Date Published: 1 November 2005
PDF: 7 pages
Opt. Eng. 44(11) 116401 doi: 10.1117/1.2125487
Published in: Optical Engineering Volume 44, Issue 11
Show Author Affiliations
Dimitris G. Manolakis, MIT Lincoln Lab. (United States)

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