Shi-jiao GAO, Hai-ou GUAN, Xiao-dan MA, Yan-hong WANG. Soybean Canopy Extraction Method Based on Multispectral Image Processing[J]. Spectroscopy and Spectral Analysis, 2022, 42(11): 3568
- Spectroscopy and Spectral Analysis
- Vol. 42, Issue 11, 3568 (2022)
Fig. 1. Original images of soybean
(a): GRE; (b): NIR; (c): RED; (d): REG; (e): RGB
(a): GRE; (b): NIR; (c): RED; (d): REG; (e): RGB
Fig. 2. Comparison of filtering effects of multi-spectral images
(a1): GRE; (a2): NIR; (a3): RED; (a4): REG; (a5): RGB;(b1): GRE; (b2): NIR; (b3): RED; (b4): REG; (b5): RGB
(a1): GRE; (a2): NIR; (a3): RED; (a4): REG; (a5): RGB;(b1): GRE; (b2): NIR; (b3): RED; (b4): REG; (b5): RGB
Fig. 3. Multispectral images of soybean canopy with iteration method
(a1): GRE; (a2): NIR; (a3): RED; (a4): REG; (a5): RGB;(b1): GRE; (b2): NIR; (b3): RED; (b4): REG; (b5): RGB
(a1): GRE; (a2): NIR; (a3): RED; (a4): REG; (a5): RGB;(b1): GRE; (b2): NIR; (b3): RED; (b4): REG; (b5): RGB
Fig. 4. Multispectral images of soybean canopy by Otsu method
(a1): GRE; (a2): NIR; (a3): RED; (a4): REG; (a5): RGB;(b1): GRE; (b2): NIR; (b3): RED; (b4): REG; (b5): RGB
(a1): GRE; (a2): NIR; (a3): RED; (a4): REG; (a5): RGB;(b1): GRE; (b2): NIR; (b3): RED; (b4): REG; (b5): RGB
Fig. 5. Multispectral images of soybean canopy by local threshold method
(a1): GRE; (a2): NIR; (a3): RED; (a4): REG; (a5): RGB;(b1): GRE; (b2): NIR; (b3): RED; (b4): REG; (b5): RGB
(a1): GRE; (a2): NIR; (a3): RED; (a4): REG; (a5): RGB;(b1): GRE; (b2): NIR; (b3): RED; (b4): REG; (b5): RGB
Fig. 6. Entropy statistics of segmented images
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Table 1. Multispectral image preprocessing evaluation index
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Table 2. Comparison of evaluation indexes of different segmentation algorithms
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