Yan XIA, Jingyang ZHOU. Research on a low illuminance denoising method based on bilateral filter for security cameras[J]. Optical Instruments, 2023, 45(4): 88
- Optical Instruments
- Vol. 45, Issue 4, 88 (2023)
Fig. 1. Ringing effect
Fig. 2. Schematic diagram of bilateral filter
Fig. 3. Schematic of gray scale chart
Fig. 4. Pixel distribution in low illumination images
Fig. 5. The construction of image pyramid
Fig. 6. Schematic of low illumination denoising
Fig. 7. Car image with noise
Fig. 8. Car image denoised with Daubechies wavelet
Fig. 9. Car image denoised with the proposed method
Fig. 10. SNR value before denoising
Fig. 11. SNR value after denoising
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