Study on Identification of Common Diseases in Potato Storage Period Based on Spectral Structure

Hong-qiang LI; Hong SUN; Min-zan LI

doi:10.3964/j.issn.1000-0593(2022)08-2471-06

Spectroscopy and Spectral Analysis, Volume. 42, Issue 8, 2471(2022)

Study on Identification of Common Diseases in Potato Storage Period Based on Spectral Structure

Hong-qiang LI1,*... Hong SUN2,2; and Min-zan LI2,2; *; |Show fewer author(s)

Author Affiliations

¹1. School of Science, Hebei Institute of Architecture and Civil Engineering, Zhangjiakou 075000, China

²2. Key Laboratory of Modern Precision Agriculture System Integration Research, China Agricultural University, Beijing 100083, China

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Figures & Tables(8)

Fig. 1. Normal (a), dry rot (b) and scab (c) potatoes samples

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Fig. 2. Average spectra of normal, dry rot and scab potatoes

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Fig. 3. Top two principal component score map

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Fig. 4. Extreme points of spectra

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Fig. 5. The changing trend of interconnect between bands 911, 1 269 and 1 455 nm

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Table 1. The statistical results of wavelengths corresponding to extreme point and midpoint

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Table 1. The statistical results of wavelengths corresponding to extreme point and midpoint

类别	极值点,中点对应的波长/nm
正常马铃薯样本	894, 911, 942, 973, 1 020, 1 068, 1 135, 1 199, 1 235, 1 269, 1 387, 1 500, 1 650
干腐病马铃薯样本	894, 955, 1 034, 1 108, 1 169, 1 199, 1 239, 1 275, 1 364, 1 452, 1 552, 1 650
疮痂病马铃薯样本	894, 911, 938, 962, 1 024, 1 081, 1 135, 1 185, 1 235, 1 282, 1 370, 1 455, 1 552, 1 647, 1 650

Table 2. Five wavelengths selection statistical results

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Table 2. Five wavelengths selection statistical results

波长点	波长被选中次数	波长被选中百分比/%
911	1 001	8.82
955	1 001	8.82
962	1 001	8.82
973	729	6.43
1 068	729	6.43
1 081	707	6.23
1 108	701	6.18
1 185	686	6.05
1 199	686	6.05
1 275	686	6.05
1 282	686	6.05
1 452	683	6.02
1 455	683	6.02
1 500	683	6.02
1 647	683	6.02

Table 3. Results of discriminant based on PC1&PC2
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Table 3. Results of discriminant based on PC1&PC2
变量类型主成分得分识别方法错误识别率/%
主成分得分 PC1, PC2 LDA
BC 0
0

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Hong-qiang LI, Hong SUN, Min-zan LI. Study on Identification of Common Diseases in Potato Storage Period Based on Spectral Structure[J]. Spectroscopy and Spectral Analysis, 2022, 42(8): 2471

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