Flag-based detection of weak gas signatures in long-wave infrared hyperspectral image sequences

Timothy Marrinan; J. Ross Beveridge; Bruce Draper; Michael Kirby; Chris Peterson

doi:10.1117/12.2224117

17 May 2016 Flag-based detection of weak gas signatures in long-wave infrared hyperspectral image sequences

Timothy Marrinan, J. Ross Beveridge, Bruce Draper, Michael Kirby, Chris Peterson

Proceedings Volume 9840, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXII; 98401N (2016) https://doi.org/10.1117/12.2224117
Event: SPIE Defense + Security, 2016, Baltimore, MD, United States

Abstract

We present a ﬂag manifold based method for detecting chemical plumes in long-wave infrared hyperspectral movies. The method encodes temporal and spatial information related to a hyperspectral pixel into a ﬂag, or nested sequence of linear subspaces. The technique used to create the ﬂags pushes information about the background clutter, ambient conditions, and potential chemical agents into the leading elements of the ﬂags. Exploiting this temporal information allows for a detection algorithm that is sensitive to the presence of weak signals. This method is compared to existing techniques qualitatively on real data and quantitatively on synthetic data to show that the ﬂag-based algorithm consistently performs better on data when the SINRdB is low, and beats the ACE and MF algorithms in probability of detection for low probabilities of false alarm even when the SINRdB is high.

Citation Download Citation

Timothy Marrinan, J. Ross Beveridge, Bruce Draper, Michael Kirby, and Chris Peterson "Flag-based detection of weak gas signatures in long-wave infrared hyperspectral image sequences", Proc. SPIE 9840, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXII, 98401N (17 May 2016); https://doi.org/10.1117/12.2224117

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