Spectroscopy and Spectral Analysis, Volume. 42, Issue 4, 1278(2022)
Hyperspectral Estimation of Soil Organic Matter Content Based on Continuous Wavelet Transformation
Figures & Tables(8)
Fig. 2. Spectral curves of organic matter content in different grades
Fig. 3. Correlation analysis of soil organic matter content with reflectance spectra and spectral transformations
Fig. 4. The correlation between soil organic matter content and wavelet coefficients
Fig. 5. Comparison of measured and estimated values of soil organic matter content using CWT
Table 1. Basic statistical characteristics of soil samples
View tableView in ArticleTable 1. Basic statistical characteristics of soil samples
样品类型 样品数
/个有机质含量/(g·kg-1) 变异系
数/%最大值 最小值 平均值 标准差 总体样品 98 17.582 1.150 8.574 3.589 41.86
Table 2. The characteristic bands selected by different transformations
View tableView in ArticleTable 2. The characteristic bands selected by different transformations
光谱变换 特征波
段数量对应波段范围/nm 显著性水平
(p值)R 1 135 529933, 2 3512 382 <0.01 lg(1/R) 1 137 526934, 2 3492 378 <0.01 R' 318 431538, 800889,
1 4511 660, 1 9742 035<0.01 [lg(1/R)]' 293 431538, 795881,
1 7312 042<0.01
Table 3. Inversion results of modeling set and validation set for soil organic matter content
View tableView in ArticleTable 3. Inversion results of modeling set and validation set for soil organic matter content
模型 建模集 验证集 RPD R2 RMSE R2 RMSE R-PLSR 0.59 2.29 0.46 2.96 1.55 R-SVMR 0.61 2.90 0.32 2.92 1.23 lg(1/R)-PSLR 0.58 2.31 0.46 2.64 1.54 lg(1/R)-SVMR 0.63 2.23 0.31 2.99 1.60 R'-PSLR 0.61 2.24 0.46 2.64 1.59 R'-SVMR 0.69 2.05 0.48 2.59 1.74 [lg(1/R)]'-PLSR 0.61 2.23 0.46 2.62 1.60 [lg(1/R)]'-SVMR 0.72 1.93 0.53 2.44 1.85 R-CWT-21-PLSR 0.68 2.02 0.46 2.63 1.77 R-CWT-21-SVMR 0.79 1.68 0.52 2.48 1.92 R-CWT-22-PLSR 0.61 2.23 0.48 2.64 1.72 R-CWT-22-SVMR 0.82 1.56 0.56 2.38 1.98 R-CWT-23-PLSR 0.63 2.18 0.46 2.62 1.73 R-CWT-23-SVMR 0.84 1.49 0.53 2.38 2.11 R-CWT-24-PLSR 0.65 2.11 0.52 2.57 1.86 R-CWT-24-SVMR 0.87 1.37 0.50 2.44 1.91 R-CWT-25-PLSR 0.65 2.11 0.55 2.40 1.89 R-CWT-25-SVMR 0.85 1.44 0.47 2.53 1.99 R-CWT-26-PLSR 0.65 2.12 0.56 2.39 1.88 R-CWT-26-SVMR 0.85 1.45 0.50 2.53 1.86 R-CWT-27-PLSR 0.60 2.25 0.51 2.50 1.58 R-CWT-27-SWMR 0.80 1.64 0.41 2.74 1.97
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Maiming Yumiti, Xue-mei WANG. Hyperspectral Estimation of Soil Organic Matter Content Based on Continuous Wavelet Transformation[J]. Spectroscopy and Spectral Analysis, 2022, 42(4): 1278
Paper Information
Category: Research Articles
Received: Nov. 26, 2020
Accepted: --
Published Online: Jul. 25, 2023
The Author Email: Yumiti Maiming (812814409@qq.com)
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