Land Cover Classification from Hyperspectral Images via Local Nearest Neighbor Collaborative Representation with Tikhonov Regularization

Rongchao Yang, Qingbo Zhou, Beilei Fan and Yuting Wang
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Rongchao Yang: Agricultural Information Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Qingbo Zhou: Agricultural Information Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Beilei Fan: Agricultural Information Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Yuting Wang: Agricultural Information Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China

Land, 2022, vol. 11, issue 5, 1-14

Abstract: The accurate and timely monitoring of land cover types is of great significance for the scientific planning, rational utilization, effective protection and management of land resources. In recent years, land cover classification based on hyperspectral images and the collaborative representation (CR) model has become a hot topic in the field of remote sensing. However, most of the existing CR models do not consider the problem of sample imbalance, which affects the classification performance of CR models. In addition, the Tikhonov regularization term can improve the classification performance of CR models, but greatly increases the computational complexity of CR models. To address the above problems, a local nearest neighbor (LNN) method is proposed in this paper to select the same number of nearest neighbor samples from each nearest class of the test sample to construct a dictionary. This is then introduced into the original collaborative representation classification (CRC) method and CRC with Tikhonov regularization (CRT) for land cover classification, denoted as LNNCRC and LNNCRT, respectively. To verify the effectiveness of the proposed LNNCRC and LNNCRT methods, the classification performance and running time of the proposed methods are compared with those of six popular CR models on a hyperspectral scene with nine land cover types. The experimental results show that the proposed LNNCRT method achieves the best land cover classification performance, and the proposed LNNCRC and LNNCRT methods not only further exclude the interference of irrelevant training samples and classes, but also effectively eliminate the influence of imbalanced training samples, so as to improve the classification performance of CR models and effectively reduce the computational complexity of CR models.

Keywords: land cover classification; hyperspectral images; collaborative representation; sample imbalance; local nearest neighbors (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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