Tian-liang ZHANG, Dong-xing ZHANG, Tao CUI, Li YANG, Chun-ji XIE, Zhao-hui DU, Xiang-jun ZHONG. Identification of Early Lodging Resistance of Maize by Hyperspectral Imaging Technology[J]. Spectroscopy and Spectral Analysis, 2022, 42(4): 1229
- Spectroscopy and Spectral Analysis
- Vol. 42, Issue 4, 1229 (2022)
Fig. 1. Spectral image correction and spectral extraction method
(a): Color image of leaves; (b): k-means cluster result; (c): Leaves segmentation result
(a): Color image of leaves; (b): k-means cluster result; (c): Leaves segmentation result
Fig. 2. Average spectral curves of lodging-resistant varieties and lodging varieties
Fig. 3. Spectral characteristics selected by the SPA algorithm at various densities
Fig. 4. Parameter optimization effects of SPA-SVM model at various densities
Fig. 4. Parameter optimization effects of PCA-SVM model at various densities
Fig. 5. ROC curve of model prediction effect at each density
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Table 1. The division of maize sample data sets
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Table 2. Contribution rate of principal component at each density
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Table 3. The selected model parameters at each density
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