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Geosciences 2016, 6(4), 56;

Anomaly Detection from Hyperspectral Remote Sensing Imagery

School of Geosciences, University of South Florida, Tampa, FL 33620, USA
Author to whom correspondence should be addressed.
Academic Editors: Yongwei Sheng and Jesus Martinez-Frias
Received: 18 May 2016 / Revised: 30 October 2016 / Accepted: 2 December 2016 / Published: 12 December 2016
(This article belongs to the Special Issue Mapping and Assessing Natural Disasters Using Geospatial Technologies)
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Hyperspectral remote sensing imagery contains much more information in the spectral domain than does multispectral imagery. The consecutive and abundant spectral signals provide a great potential for classification and anomaly detection. In this study, two real hyperspectral data sets were used for anomaly detection. One data set was an Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) data covering the post-attack World Trade Center (WTC) and anomalies are fire spots. The other data set called SpecTIR contained fabric panels as anomalies compared to their background. Existing anomaly detection algorithms including the Reed–Xiaoli detector (RXD), the blocked adaptive computation efficient outlier nominator (BACON), the random selection based anomaly detector (RSAD), the weighted-RXD (W-RXD), and the probabilistic anomaly detector (PAD) are reviewed here. The RXD generally sets strict assumptions to the background, which cannot be met in many scenarios, while BACON, RSAD, and W-RXD employ strategies to optimize the estimation of background information. The PAD firstly estimates both background information and anomaly information and then uses the information to conduct anomaly detection. Here, the BACON, RSAD, W-RXD, and PAD outperformed the RXD in terms of detection accuracy, and W-RXD and PAD required less time than BACON and RSAD. View Full-Text
Keywords: hyperspectral imagery; anomaly detection; fire mapping hyperspectral imagery; anomaly detection; fire mapping

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Guo, Q.; Pu, R.; Cheng, J. Anomaly Detection from Hyperspectral Remote Sensing Imagery. Geosciences 2016, 6, 56.

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