Hyperbolic Space-Based Autoencoder for Hyperspectral Anomaly Detection

He Sun, Lizhi Wang, Lei Zhang*, Lianru Gao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Deep-learning (DL)-based methods have been shown to be effective on the hyperspectral image (HSI) anomaly detection task because of their feature extraction ability. However, current DL-based methods lack an effective means of regularizing the background information. In this article, the hyperbolic space-based autoencoder (HSAE) is proposed for the hyperspectral anomaly detection task. We assume that an effective hierarchical structural representation can better model the HSI in the spatial domain, and this enables the background information to be effectively regularized. Motivated by this idea, the HSAE embeds the HSI into hyperbolic space, which is a non-Euclidean geometry with a constant negative curvature and an exponential growth distance between points. Using a wrapped normal prior distribution, the training of the hidden representation is supervised to preserve more hierarchical features. After the training process, a hyperbolic distance-based anomaly detector (HDB) is introduced to discover anomalies in a more robust way. Experimental results on several popular HSI benchmarks fully demonstrate the superiority of our HSAE.

Original languageEnglish
Article number5522115
JournalIEEE Transactions on Geoscience and Remote Sensing
Volume62
DOIs
Publication statusPublished - 2024

Keywords

  • Anomaly detection
  • autoencoder (AE)
  • hyperbolic space
  • hyperspectral image (HSI)

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