Rice False Smut Monitoring Based on Band Selection of UAV Hyperspectral Data

Author:

Wang Yanxiang123,Xing Minfeng123ORCID,Zhang Hongguo1ORCID,He Binbin1,Zhang Yi24

Affiliation:

1. School of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, China

2. Key Laboratory of Space Ocean Remote Sensing and Application, Ministry of Natural Resources, Beijing 100081, China

3. Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China

4. Deep Ocean Environment Remote Sensing Monitoring Department, National Satellite Ocean Application Service, Beijing 100081, China

Abstract

Rice false smut (RFS) is a late-onset fungal disease that primarily affects rice panicle in recent years. Severe RFS can decrease the yield by 20–30% and severely affect rice quality. This research used hyperspectral remote sensing data from unmanned aerial vehicles (UAV). On the basis of genetic algorithm combined with partial least squares to select the feature bands, this paper creates a new method to use the Pearson correlation coefficient method and Instability Index between Classes (ISIC) method to further select characteristic bands, which further eliminated 27.78% of the feature bands when the model monitoring accuracy was improved overall. The prediction accuracy of the Gradient Boosting Decision Tree model and Random Forest model was the best, which were 85.62% and 84.10%, respectively, and the monitoring accuracy was improved by 2.22% and 2.4% compared with that before optimization. Then, based on the UAV hyperspectral data and the combination of characteristic bands selected by the three band optimization methods, the sensitive band ranges of rice false smut monitoring were determined, which were 698–800 nm and 974–997 nm. This paper provides an effective method of selecting characteristic bands of hyperspectral data and a method of monitoring crop diseases’ using unmanned aerial vehicles.

Funder

Open Fund of Key Laboratory of Space Ocean Remote Sensing and Application, Ministry of Natural Resource

National Natural Science Foundation of China

Huzhou Public Welfare Applied Research Project

Scientific Research Starting Foundation from Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China

Publisher

MDPI AG

Subject

General Earth and Planetary Sciences

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