基于无人机低空多光谱遥感监测的烤烟株高研究

Research on Plant Height of Flue-Cured Tobacco Based on UAV Low-Altitude Multispectral Remote Sensing Monitoring

为利用遥感技术研究多光谱特征与作物株高结构的关系,利用改装的DJI M100航拍仪搭载Parrot Sequoia传感器对烤烟株高生长情况进行监测,然后结合植被指数影像再合成方式对遥感数据进行提取、分析,通过多光谱特征构建基于烤烟株高的生长模型,并使用烤烟的实测理化数据对模型进行验证。结果表明,烤烟缓苗期红波反射率能较好对应烤烟株高,团棵期红边波反射率能较好对应烤烟株高,旺长期近红外波反射率能较好对应烤烟株高,成熟期绿波反射率能较好对应烤烟株高。据此构建基于多光谱反射率的烤烟株高估算模型,用误差分析指标对模型进行验证,结果表明基于绿波波段光谱反射率估算模型估算成熟期烤烟株高具有一定的可行性。本研究可为利用多光谱遥感监测烤烟长势提供新的方法和思路。

In order to study the relationship between multispectral characteristics and plant height structure,a modified DJI M100 aerial camera carried Parrot Sequoia sensor was used to monitor the growth of fluecured tobacco plant height.The remote sensing data were extracted and analyzed in combination with the vegetation index image resynthesis method.The plant height growth model was constructed by multi spectral characteristics and the model was verified by the measured physical and chemical data of flue-cured tobacco.The results showed that red wave reflectance could better correspond to the plant height of flue-cured tobacco at seedling stage,the red edge wave reflectance could better correspond to plant height at resettling stage,the near red wave reflectance could basically correspond to plant height at vigorous growth stage,and the green wave reflectance could better correspond to plant height at mature stage.The estimation model of flue-cured tobacco plant height based on multi spectral reflectance was constructed,and the error analysis index was used to verify it.The results showed that estimating flue-cured tobacco plant height at mature stage based on the green wave band spectral reflectance estimation model was feasible.This study could provide a new method and idea for monitoring the growth of flue-cured tobacco using multispectral remote sensing.