Jia-yi XU, Xue HUANG, Hua-ping LUO, Jin-xiu LIU, Yu-ting SUO, Chang-xu WANG. Effects of Orientation and Quality on Spatial Spectrum Characteristics of Fruits in Southern Xinjiang[J]. Spectroscopy and Spectral Analysis, 2022, 42(3): 910
- Spectroscopy and Spectral Analysis
- Vol. 42, Issue 3, 910 (2022)
Fig. 1. Layout of test samples
Fig. 2. Background spectra of some samples
Fig. 3. Eliminating abnormal spectra of winter Jujube by Mahalanobis distance
Fig. 4. Eliminating abnormal sugar content samples of winter Jujube by concentration residual
Fig. 5. CARS method selects the characteristic wavelength of winter Jujube sugar
(a): Relationship between interation number and wavelength variable; (b): RMSECV value for different interations; (c): Variable PLS regression coefficient value
(a): Relationship between interation number and wavelength variable; (b): RMSECV value for different interations; (c): Variable PLS regression coefficient value
Fig. 6. Background spectra of winter jujube and results of con+1st modeling of sugar content
(a): Model sample regression; (b): Model sample error
(a): Model sample regression; (b): Model sample error
Fig. 7. Comparison of inversion results of Roujean model
(a): Winter jujube; (b): Red grapes; (c): Fragrant pear
(a): Winter jujube; (b): Red grapes; (c): Fragrant pear
Fig. 8. Comparison of inversion results of Walthall model
(a): Winter jujube; (b): Red grapes; (c): Fragrant pear
(a): Winter jujube; (b): Red grapes; (c): Fragrant pear
Fig. 9. Error comparison of different fruits retrieved by Roujean model
(a): Winter jujube; (b): Red grapes; (c): Fragrant pear
(a): Winter jujube; (b): Red grapes; (c): Fragrant pear
Fig. 10. Error comparison of different fruits retrieved by Walthall model
(a): Winter jujube; (b): Red grapes; (c): Fragrant pear
(a): Winter jujube; (b): Red grapes; (c): Fragrant pear
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Table 1. Results of background spectrum and sugar modeling of winter Jujube under different treatment methods
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Table 2. Modeling results of different winter jujube physicochemical values
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Table 3. Modeling results of different Red grapes physicochemical values
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Table 4. Modeling results of different Fragrant Pear physicochemical values
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Table 5. Comparison of inversion results of roujean model
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Table 6. Comparison of inversion results of Walthall model
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