Hyperspectral remote sensing inversion of soil salinity in north Shaanxi based on PLSR
LI Xiaoming1,2, WANG Shuguang1,2, HAN Jichang1,2
1. Shaanxi Land Engineering Construction Group, Xi'an 710075, China; 2. Key Laboratory of Degraded and Unused Land Consolidation Engineering, Ministry of Land and Resources of China, Xi'an 710075, China
Abstract:The salinized soil in northern Shaanxi Province was chosen as the study object. The hyperspectral data were collected and the soil samples were analyzed. First, the correlation between the soil salinity and the reflectance were analyzed, and the characteristic bands were fitted. The usual regression and partial least squares regression (PLSR) analysis was used to study the inversion model of soil salinity, and some testing samples were used to compare the accuracies. The results show that 482 nm, 1 365 nm, 1 384 nm, 2 202 nm and 2 353 nm are five characteristic wavelengths, and the precision of inversion is satisfactory. The result of precision test indicates that the inversion model with PLSR calculated by Matlab is fairly good, and the correlation between the measured value and the predicted value is better.
李晓明, 王曙光, 韩霁昌. 基于PLSR的陕北土壤盐分高光谱反演[J]. 国土资源遥感, 2014, 26(3): 113-116.
LI Xiaoming, WANG Shuguang, HAN Jichang. Hyperspectral remote sensing inversion of soil salinity in north Shaanxi based on PLSR. REMOTE SENSING FOR LAND & RESOURCES, 2014, 26(3): 113-116.
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