基于低空无人机影像光谱和纹理特征的棉花氮素营养诊断研究
Cotton Nitrogen Nutrition Diagnosis Based on Spectrum and Texture Feature of Images from Low Altitude Unmanned Aerial Vehicle
图4. 不同情景下棉花植株氮浓度反演结果
A：剔除土壤背景信息前的建模结果;B：剔除土壤背景信息前的验证结果;C：剔除土壤背景信息后的建模结果;D：剔除土壤背景信息后的验证结果;E：剔除土壤背景信息+增加纹理信息的建模结果;F：剔除土壤背景信息+增加纹理信息的验证结果
Fig. 4. Prediction results of cotton plant nitrogen concentration under different scenarios
A: Calibration results before removing soil background; B: Validation results before removing soil background; C: Calibration results after removing soil background; D: Validation results after removing soil background; E: Calibration results after removing soil background and adding texture information; F: Validation results after removing soil background and adding texture information
