Spectral Adversarial Feature Learning for Anomaly Detection in Hyperspectral Imagery

2020-04-01

PRE

Weiying Xie

Baozhu Liu

Yunsong Li

Jie Lei

Chein‐I Chang

Gang He *

DOI：10.1109/TGRS.2019.2948177

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Theoretically, hyperspectral images (HSIs) are capable of providing subtle spectral differences between different materials, but in fact, it is difficult to distinguish between background and anomalies because the samples of anomalous pixels in HSIs are limited and susceptible to background and noise. To explore the discriminant features, a spectral adversarial feature learning (SAFL) architecture is specially designed for hyperspectral anomaly detection in this article. In addition to reconstruction loss, SAFL also introduces spectral constraint loss and adversarial loss in the network with batch normalization to extract the intrinsic spectral features in deep latent space. To further reduce the false alarm rate, we present an iterative optimization approach by a weighted suppression function that depends on the contribution rate of each feature to the detection. In particular, the structure tensor matrix is adopted to adaptively calculate the contribution rate of each feature. Benefiting from these improvements, the proposed method is superior to the typical and state-of-the-art methods either in detection probability or false alarm rate.

Keywords:

Feature extraction

Anomaly detection

Hyperspectral imaging

Decoding

Image reconstruction

Training

Adversarial learning

anomaly detection

feature extraction

hyperspectral image (HSI)

iterative optimization

Spectral Adversarial Feature Learning for Anomaly Detection in Hyperspectral Imagery

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