Extraction of tree crowns damaged byDendrolimus tabulaeformisTsaietLiu via spectral-spatial classification using UAV-based hyperspectral images

文献类型： 外文期刊

第一作者： Zhang, Ning

作者： Zhang, Ning;Wang, Yueting;Zhang, Xiaoli;Zhang, Ning;Zhang, Ning

作者机构：

关键词： UAV-based hyperspectral image; Spectral-spatial classification; SVM; EPF; Damaged tree crown extraction

期刊名称：PLANT METHODS （ 影响因子：4.993； 五年影响因子：5.312 ）

ISSN：

年卷期： 2020 年 16 卷 1 期

页码：

收录情况： SCI

摘要： Background Tree crown extraction is an important research topic in forest resource monitoring. In particular, it is a prerequisite for disease detection and mapping the degree of damage caused by forest pests. Unmanned aerial vehicle (UAV)-based hyperspectral imaging is effective for surveying and monitoring forest health. This article proposes a spectral-spatial classification framework that uses UAV-based hyperspectral images and combines a support vector machine (SVM) with an edge-preserving filter (EPF) for completing classification more finely to automatically extract tree crowns damaged byDendrolimus tabulaeformisTsaietLiu (D. tabulaeformis) in Jianping county of Liaoning province, China. Results Experiments were conducted using UAV-based hyperspectral images, and the accuracy of the results was assessed using the mean structure similarity index (MSSIM), the overall accuracy (OA), kappa coefficient, and classification accuracy of damagedPinus tabulaeformis. Optimized results showed that the OA of the spectral-spatial classification method can reach 93.17%, and the extraction accuracy of damaged tree crowns is 7.50-9.74% higher than that achieved using the traditional SVM classifier. Conclusion This study is one of only a few in which a UAV-based hyperspectral image has been used to extract tree crowns damaged byD. tabulaeformis. Moreover, the proposed classification method can effectively extract damaged tree crowns; hence, it can serve as a reference for future studies on both forest health monitoring and larger-scale forest pest and disease assessment.

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