Yiming Fang, Fan Yang, Xiaoqin Li. Detection of Damage on the Surface of Korla Fragrant Pear Using Hyperspectral Images[J]. Laser & Optoelectronics Progress, 2020, 57(14): 141017
- Laser & Optoelectronics Progress
- Vol. 57, Issue 14, 141017 (2020)
Fig. 1. Schematic of hyperspectral imaging device
Fig. 2. Collected hyperspectral images of typical Korla pear samples at different wavelengths. (a) 400 nm; (b) 494 nm; (c) 587 nm; (d) 681 nm; (e) 774 nm; (f) 868 nm
Fig. 3. Spectra of Korla pear surfaces and background areas. (a) Spectra; (b) average value and variance of spectral curves
Fig. 4. Hyperspectral images and their histogram plots at three wavelengths. (a) 433 nm; (b) 631 nm; (c) 863 nm
Fig. 5. Results of OTSU threshold segmentation and morphological analysis for hyperspectral images at three wavelengths. (a) 433 nm; (b) 631 nm; (c) 863 nm
Fig. 6. The first six primary component images obtained by PCA. (a) PC 1; (b) PC 2; (c) PC 3; (d) PC 4; (e) PC 5; (f) PC 6
Fig. 7. Results of the ratio enhancement and image segmentation. (a) Result of ratio enhancement; (b) result of threshold segmentation; (c) result of morphological calculation
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Table 1. Detection results of surface damage of fragrant pear using hyperspectral images
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