Fig. 1. Extending One-D SG convolution kernel into Two-D convolution kernel in four directions

Fig. 2. Pavia University hyperspectral image

Fig. 3. The performance comparison of TSG and SG with different convolution kernel parameters
(a—c): SNR, PSNR, SSIM after SG filter; (d—f): SNR, PSNR, SSIM after TSG filter

Fig. 4. Gray image of 77 band
(a): Raw image; (b): Processed by SG filter;(c): Processed by TSG filter

Fig. 5. The spectrum after processed by different filtering algorithms
(a): Raw spectrum; (b): Processed by SG filter;(c): Processed by TSG filter

Fig. 6. The acquisition system of hyperspectral image

Fig. 7. The visualization of classification results and mask of wheat hyperspectral image
(a—d): The hyperspectral image, mask imgae, classification results after SG/TSG filter of health wheat; (e—h): The hyperspectral image, mask imgae, classification results after SG/TSG filter of infected wheat