9 September 2021 Spatial–spectral hyperspectral image classification based on primary and secondary capsule network
Xin Wang, Jiansi Ren, Ruoxiang Wang, Wei Wu, Jiannan Chen
Author Affiliations +
Abstract

Hyperspectral images contain rich spectral–spatial information. Therefore exploring spectral–spatial classifiers has become a mainstream trend in the field of hyperspectral image classification. However, current studies seldom delve into the contribution of the extracted spectral and spatial features to the subsequent classification task. To further explore the contribution of spectral and spatial features, we propose a classification framework based on capsule network (CapsNet). The framework consists of two branches, which extract spectral and spatial features to form capsules respectively. Subsequently, the spectral capsules and spatial capsules are sent to the dynamic routing layer to generate higher-level spectral–spatial capsules. In addition, we set up a primary–secondary relationship for the two branches, which indirectly reflects the contribution made by lower capsules forming higher capsules in the feature fusion stage. Our experiments, conducted on three widely used hyperspectral datasets and two sampling strategies, demonstrate that our proposed model had 4.60% to 8.80% improvements in OA compared with the original CapsNet. Compared to the capsule-based improved model (iCapsNet and Conv-Caps), our model also has a 1.20% to 2.50% improvement.

© 2021 Society of Photo-Optical Instrumentation Engineers (SPIE) 1931-3195/2021/$28.00 © 2021 SPIE
Xin Wang, Jiansi Ren, Ruoxiang Wang, Wei Wu, and Jiannan Chen "Spatial–spectral hyperspectral image classification based on primary and secondary capsule network," Journal of Applied Remote Sensing 15(3), 036518 (9 September 2021). https://doi.org/10.1117/1.JRS.15.036518
Received: 12 April 2021; Accepted: 27 August 2021; Published: 9 September 2021
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CITATIONS
Cited by 5 scholarly publications.
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KEYWORDS
Hyperspectral imaging

Image classification

Data modeling

Performance modeling

Feature extraction

Statistical modeling

Principal component analysis

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