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A Theoretical Framework for Hyperspectral Anomaly Detection Using Spectral and Spatial A Priori Information

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2 Author(s)
Yver, B. ; Lab. of Remote Sensing, Commissariat a I''Energie Atomique (CEA), Bruyeres-le-Chatel ; Marion, R.

This letter presents a new theoretical approach for anomaly detection using a priori information about targets. This a priori knowledge deals with the general spectral behavior and the spatial distribution of targets. In this letter, we consider subpixel and isolated targets that are spectrally anomalous in one region of the spectrum but not in another. This method is totally different from matched filters that suffer from a relative sensitivity to low errors in the target spectral signature. We incorporate the spectral a priori knowledge in a new detection distance, and we propose a Bayesian approach with a Markovian regularization to suppress the potential targets that do not respect the spatial a priori. The interest of the method is illustrated on simulated data consisting in realistic anomalies that are superimposed on a real HyMap hyperspectral image.

Published in:

Geoscience and Remote Sensing Letters, IEEE  (Volume:4 ,  Issue: 3 )

Date of Publication:

July 2007

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