Bayesian context-dependent learning for anomaly classification in hyperspectral imagery

TitleBayesian context-dependent learning for anomaly classification in hyperspectral imagery
Publication TypeJournal Article
Year of Publication2014
AuthorsRatto, CR, Jr, KDM, Collins, LM, and Torrione, PA
JournalIEEE Transactions on Geoscience and Remote Sensing
Volume52
Issue4
Start Page1969
Pagination1969 - 1981
Date Published04/2014
Abstract

Many remote sensing applications involve the classification of anomalous responses as either objects of interest or clutter. This paper addresses the problem of anomaly classification in hyperspectral imagery (HSI) and focuses on robustly detecting disturbed earth in the long-wave infrared (LWIR) spectrum. Although disturbed earth yields a distinct LWIR signature that distinguishes it from the background, its distribution relative to clutter may vary over different environmental contexts. In this paper, a generic Bayesian framework is proposed for training context-dependent classification rules from wide-area airborne LWIR imagery. The proposed framework combines sparse classification models with either supervised or discriminative context identification to pool information across contexts and improve classification overall. Experiments are performed with data from a LWIR landmine detection system. Contexts are learned from endmember abundances extracted from the background near each detected anomaly. Classification performance is compared with single-classifier approaches using the same information as well as other baseline anomaly detectors from the literature. Results indicate that utilizing context for classifying anomalies in HSI could lead to more robust performance over varying terrain. © 2013 IEEE.

DOI10.1109/TGRS.2013.2257175
Short TitleIEEE Transactions on Geoscience and Remote Sensing