Spectroscopy and Spectral Analysis, Volume. 41, Issue 11, 3405(2021)
Optimization of Fruit Pose and Modeling Method for Online Spectral Detection of Apple Moldy Core
Figures & Tables(9)
Fig. 1. Contrast of healthy fruit (left) and fruit with moldy core (right)
Fig. 2. Average transmission spectra of healthy fruit and fruit with moldy core in four transportation postures
(a): Stem upward; (b): Stem downward; (c): Stem towards the transportation direction;(d): Stem perpendicular to the transportation direction
Fig. 3. Comparison of the performance (a) and the number of moldy core apples incorrectly identified as healthy (b) of the six discriminant models
Table 1. Appearance parameter statistics of healthy fruit and fruit with moldy core
View tableView in ArticleTable 1. Appearance parameter statistics of healthy fruit and fruit with moldy core
样品分类 数量
/个平均最大
果径/mm平均高度
/mm平均重量
/g健康果 78 87.0 71.5 240.3 病果 18 86.4 70.7 224.6 全部样品 96 86.9 71.4 237.4
Table 2. Comparison of three discriminant modeling results of LDA, MD and KNN based on PCs extracted from transmission spectra (600~900 nm) of apples with four types of posture
View tableView in ArticleTable 2. Comparison of three discriminant modeling results of LDA, MD and KNN based on PCs extracted from transmission spectra (600~900 nm) of apples with four types of posture
方法 摆放姿态 PCs 训练集 预测集 错判个数 准确率
/%错判个数 准确率
/%病果 健康果 病果 健康果 LDA 竖放柄朝上 37 1 0 98.44 0 3 90.63 竖放柄朝下 37 0 0 100 2 4 81.25 横放柄朝输送方向 38 0 2 96.88 1 12 59.38 横放柄垂直输送方向 37 1 4 92.19 2 10 62.50 MD 竖放柄朝上 13 4 0 93.75 4 0 87.50 竖放柄朝下 14 2 0 96.88 4 0 87.50 横放柄朝输送方向 10 2 0 96.88 4 0 87.50 横放柄垂直输送方向 14 2 0 96.88 4 0 87.50 KNN 竖放柄朝上 12 9 0 85.94 2 2 87.50 竖放柄朝下 12 12 0 81.25 3 0 90.63 横放柄朝输送方向 9 11 1 81.25 3 3 81.25 横放柄垂直输送方向 9 12 0 81.25 2 2 87.50
Table 3. PLS-DA results using transmission spectra (600~900 nm) of apples with 4 types of posture
View tableView in ArticleTable 3. PLS-DA results using transmission spectra (600~900 nm) of apples with 4 types of posture
摆放姿态 LVs 训练集 预测集 错判个数 准确率/% 错判个数 准确率/% 病果 健康果 病果 健康果 竖放柄朝上 7 6 3 85.94 0 2 93.75 竖放柄朝下 7 8 1 85.94 1 1 93.75 横放柄朝输送方向 7 2 1 90.63 4 2 90.63 横放柄垂直输送方向 2 12 0 81.25 4 0 87.50
Table 4. Comparison of two modeling results of ELM and SVM using transmission spectra (600~900 nm) of apples with 4 types of posture
View tableView in ArticleTable 4. Comparison of two modeling results of ELM and SVM using transmission spectra (600~900 nm) of apples with 4 types of posture
方法 摆放姿态 训练集 预测集 错判个数 准确率
/%错判个数 准确率
/%病果 健康果 病果 健康果 ELM 竖放柄朝上 6 0 90.63 1 2 90.63 竖放柄朝下 1 7 87.50 2 2 87.50 横放柄朝输送方向 1 4 92.19 2 1 90.63 横放柄垂直输送方向 2 5 89.06 1 2 90.63 SVM 竖放柄朝上 0 7 89.06 1 0 96.88 竖放柄朝下 0 12 81.25 0 4 87.50 横放柄朝输送方向 0 0 100.00 4 1 84.38 横放柄垂直输送方向 1 4 92.19 4 1 84.38
Table 5. PLS-DA results using transmission spectra (690~720 nm) of apples with 4 types of posture
View tableView in ArticleTable 5. PLS-DA results using transmission spectra (690~720 nm) of apples with 4 types of posture
摆放姿态 LVs 训练集 预测集 错判个数 准确率/% 错判个数 准确率/% 病果 健康果 病果 健康果 竖放柄朝上 4 4 0 93.75 0 2 93.75 竖放柄朝下 3 13 1 78.13 2 0 93.75 横放柄朝输送方向 4 1 2 95.31 1 4 84.38 横放柄垂直输送方向 3 12 1 79.69 4 0 87.50
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Kai QIN, Gang CHEN, Jian-yi ZHANG, Xia-ping FU. Optimization of Fruit Pose and Modeling Method for Online Spectral Detection of Apple Moldy Core[J]. Spectroscopy and Spectral Analysis, 2021, 41(11): 3405
Paper Information
Category: Orginal Article
Received: Oct. 20, 2020
Accepted: --
Published Online: Dec. 17, 2021
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