Zhi-hao WANG, Yong YIN, Hui-chun YU, Yun-xia YUAN, Shu-ning XUE. Early Warning Method of Apple Spoilage Based on 2D Hyperspectral Information Representation With Pixel Mean and Variance[J]. Spectroscopy and Spectral Analysis, 2022, 42(7): 2290
- Spectroscopy and Spectral Analysis
- Vol. 42, Issue 7, 2290 (2022)
Fig. 1. Hyperspectral image acquisition system
Fig. 2. Extraction of interest region in apple sample image
Fig. 3. The spectral data of apple samples based on the mean representation before and after SG treatment
(a): Before SG smoothing; (b): After SG smoothing
(a): Before SG smoothing; (b): After SG smoothing
Fig. 4. The spectral data of apple samples based on the variance representation before and after SG treatment
(a): Before SG smoothing; (b): After SG smoothing
(a): Before SG smoothing; (b): After SG smoothing
Fig. 5. The change of hue angle of apple samples with the storage days
Fig. 6. The spectral data of apple samples at 675.11 nm based on mean representation
Fig. 7. The Bhattacharyya distance results of hyperspectral information based on mean representation
Fig. 8. Bhattacharyya distance of hyperspectral information based on variance representation
Fig. 9. Bhattacharyya distance results based on 2D hyperspectral information representation with mean and variance
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Table 1. Hue angle change of apple samples
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Table 2. Water loss rate change of apple samples
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Table 3. Feature wavelengths
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