期刊
AGRICULTURAL AND FOREST METEOROLOGY
卷 252, 期 -, 页码 144-154出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.agrformet.2018.01.021
关键词
Rice lodging; Visible light-based imaging; Support vector machine; Thermal infrared imaging; Unmanned aerial vehicle
资金
- National Natural Science Foundation of China [31701355]
- National Key Research and Development Program of China [2016YFD0300405]
- China Postdoctoral Science Foundation [2016M60048]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- science and technology plan project of Yangzhou [YZ2016251]
- Jiangsu Agricultural Industry Technology System
Rice lodging not only causes difficulty in harvest operations, but also drastically reduces yield. Rice lodging assessment contributes greatly to rice plantation and crop field management. In this study, we collected visible and thermal infrared images with an unmanned aerial vehicle. Then, based on hybrid image analysis and field investigation, we established a comprehensive rice lodging recognition model using a particle swarm optimization and support vector machine algorithm. The results showed that color and texture features were different between lodged and non-lodged rice plants. Moreover, the temperature was distinct between lodging and non lodging areas, with lodged rice having higher canopy temperature. The developed model based on the visible and thermal infrared images was validated using different Indica and Japonica rice cultivars. The model had a false positives rate and false negatives rate of less than 10%, and estimated lodging rate with an R-2 greater than 0.9. These results indicated that combination of visible and thermal infrared images feature significantly increased the rice lodging recognition accuracy. The developed model can be used to monitor rice lodging and estimate the lodging rate.
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