Hyperspectral Band Selection With Iterative Graph Autoencoder

Hyperspectral band selection (BS) is an important task for hyperspectral image (HSI) processing, which aims to select a discriminative and low-redundant band subset. As a significant cue for BS, structure information describes the cross-band correlation, which brings the redundancy of HSI. Existing...

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Vydáno v:IEEE transactions on geoscience and remote sensing Ročník 61; s. 1 - 13
Hlavní autoři: Zhou, Yuan, Yao, Qingren, Huo, Shuwei, Li, Xiaofeng
Médium: Journal Article
Jazyk:angličtina
Vydáno: New York IEEE 2023
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
Artificial neural networks
Banded structure
Construction
Convolution
Correlation
Design
Feature extraction
Graph autoencoder (GAE)
Graph neural networks
graph representation
Graphical representations
hyperspectral band selection (BS)
Hyperspectral imaging
Information processing
Iterative methods
Methods
Neural networks
Redundancy
representativeness
Symmetric matrices
Task analysis
ISSN:0196-2892, 1558-0644
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Shrnutí:Hyperspectral band selection (BS) is an important task for hyperspectral image (HSI) processing, which aims to select a discriminative and low-redundant band subset. As a significant cue for BS, structure information describes the cross-band correlation, which brings the redundancy of HSI. Existing methods model structure information via manual rule-based graph construction. However, such a graph construction method fails to model complex and diverse structural relationships of HSI data. To address this problem, we propose a data-driven method, named iterative graph autoencoder for BS (IGAEBS). It adaptively captures structure information by a data-specific automatic construction process, rather than by a fixed empirical design. Specifically, we propose a new unsupervised pretext task to train graph convolution neural networks to extract HSI features. These features are used to construct a graph to represent the structural relationships among bands. To enhance the reliability of the graph, we further design an iterative graph improvement mechanism to progressively refine the structure representation. Using the derived graph, we partition the bands into several clusters and select a representative band from each cluster. During the selection process, both intracluster information and intercluster information are considered to improve the discriminativeness of band subset. Extensive experiments are conducted on three public datasets to validate the superiority of the proposed method compared to other state-of-the-art methods.
Bibliografie:ObjectType-Article-1
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content type line 14
ISSN:0196-2892
1558-0644
DOI:10.1109/TGRS.2023.3273776