- Spectroscopy and Spectral Analysis
- Vol. 42, Issue 9, 2694 (2022)
Fig. 1. Flow chart of fuzzy C-clustering method based on UMAP assisted
Fig. 2. Principle of the terahertz time-domain spectroscopy system
Fig. 3. Time domain diagram of four transgenic cotton seeds
Fig. 4. Frequency domain diagram of four transgenic cotton seeds
Fig. 5. The absorbance of four transgenic cotton seeds
Fig. 6. Clustering result of different dimensionality reduction methods (3D)
(a): Clustering result of PCA; (b): Clustering result of LLE; (c): Clustering result of LPP; (d): Clustering result of UMAP
(a): Clustering result of PCA; (b): Clustering result of LLE; (c): Clustering result of LPP; (d): Clustering result of UMAP
Fig. 7. Selection of cluster centers
Fig. 8. Clustering result of FCM assisted by different dimensionality reduction methods (3D)
(a): Clustering result of PCA-assisted FCM; (b): Clustering result of LLE-assisted FCM; (c): Clustering result of LPP-assisted FCM; (d): Clustering result of UMAP-assisted FCM
(a): Clustering result of PCA-assisted FCM; (b): Clustering result of LLE-assisted FCM; (c): Clustering result of LPP-assisted FCM; (d): Clustering result of UMAP-assisted FCM
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Table 1. The clustering correct rate of different dimension reduction-method assisted FCM
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