Adaptive anomaly detection using subspace separation for hyperspectral imagery

Heesung Kwon; Sandor Z. Der; Nasser M. Nasrabadi

doi:10.1117/1.1614265

1 November 2003 Adaptive anomaly detection using subspace separation for hyperspectral imagery

Heesung Kwon, Sandor Z. Der, Nasser M. Nasrabadi

Optical Engineering, Vol. 42, Issue 11, (November 2003). https://doi.org/10.1117/1.1614265

We propose adaptive anomaly detectors that find materials whose spectral characteristics are substantially different from those of the neighboring materials. Target spectral vectors are assumed to have different statistical characteristics from the background vectors. We use a dual rectangular window that separates the local area into two regions—the inner window region (IWR) and outer window region (OWR). The statistical spectral differences between the IWR and OWR are exploited by generating subspace projection vectors onto which the IWR and OWR vectors are projected. Anomalies are detected if the projection separation between the IWR and OWR vectors is greater than a predefined threshold. Four different methods are used to produce the subspace projection vectors. The four proposed anomaly detectors are applied to Hyperspectral Digital Imagery Collection Experiment (HYDICE) images and the detection performance for each method is evaluated.

©(2003) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Heesung Kwon, Sandor Z. Der, and Nasser M. Nasrabadi "Adaptive anomaly detection using subspace separation for hyperspectral imagery," Optical Engineering 42(11), (1 November 2003). https://doi.org/10.1117/1.1614265

Published: 1 November 2003

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