基于小波变换和连续投影算法的黑土有机质含量高光谱估测

肖艳, 辛洪波, 王斌, 崔利, 姜琦刚

Hyperspectral estimation of black soil organic matter content based on wavelet transform and successive projections algorithm

XIAO Yan, XIN Hongbo, WANG Bin, CUI Li, JIANG Qigang

表3 SPA算法筛选后的土壤全谱和1~7层小波低频系数的估测模型评价结果

Tab.3 Evaluation results of the estimation models of the soil original spectrum and the wavelet coefficients of 1 to 7 levels screened by successive projections algorithm

级别 PLS SVM 变量数 量/个 R2 RMSE/ (g·kg-1) R2 RMSE/ (g·kg-1) 土壤全谱 0.77 6.38 0.85 5.80 18 第1层 0.33 10.93 0.77 6.51 26 第2层 0.86 4.94 0.79 6.46 33 第3层 0.77 6.41 0.91 4.12 18 第4层 0.91 4.00 0.87 4.96 14 第5层 0.92 3.84 0.85 5.39 11 第6层 0.93 3.48 0.80 6.18 11 第7层 0.82 5.70 0.72 7.15 9