22 July 2020 Semisupervised collaborative representation graph embedding for hyperspectral imagery
Yi Li, Jinxin Zhang, Meng Lv, Ling Jing
Author Affiliations +
Abstract

Graph embedding (GE) frameworks are used for extracting the discriminative features of hyperspectral images (HSIs). However, it is difficult to select a proper neighborhood size for graph construction. To overcome this difficulty, a semisupervised feature extraction (FE) method, called semisupervised collaborative representation graph embedding (SCRGE), is proposed. The proposed algorithm utilizes collaborative representation (CR) to obtain the collaborative coefficients of labeled and unlabeled samples. Then, a semisupervised graph is constructed using the collaborative coefficients of the labeled samples within the same class and the collaborative coefficients of the unlabeled samples, and an interclass graph is constructed using the collaborative coefficients of the labeled samples in different classes. Finally, a projection matrix for FE is obtained by embedding these graphs into a low-dimensional space. SCRGE not only inherits the merits of CR to reveal the collaborative reconstructive properties of data but also enhances intraclass compactness and interclass separability to improve the discriminating power for classification. Experimental results on three real HSIs datasets demonstrate that SCRGE outperforms other state-of-the-art FE methods in terms of classification accuracy.

© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE) 1931-3195/2020/$28.00 © 2020 SPIE
Yi Li, Jinxin Zhang, Meng Lv, and Ling Jing "Semisupervised collaborative representation graph embedding for hyperspectral imagery," Journal of Applied Remote Sensing 14(3), 036509 (22 July 2020). https://doi.org/10.1117/1.JRS.14.036509
Received: 4 February 2020; Accepted: 10 July 2020; Published: 22 July 2020
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CITATIONS
Cited by 3 scholarly publications.
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KEYWORDS
Chromium

Matrices

Hyperspectral imaging

Lithium

Image classification

Principal component analysis

Feature extraction

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