Qi-xing TANG, Yi ZHOU, Pang-da DAI, Yan-wei GAO, Bo-qiang FAN, Meng-qi LI, Ying HE, Kun YOU, Yu-jun ZHANG. Research on Constant Temperature Two-Color Light Sources for Nighttime Visibility Estimation[J]. Spectroscopy and Spectral Analysis, 2021, 41(1): 312
- Spectroscopy and Spectral Analysis
- Vol. 41, Issue 1, 312 (2021)
Fig. 1. The diagram of the dual light sources visibility measurement method
The black block is bold
The black block is bold
Fig. 2. The relationship between wavelength and transmittance
The visibility is 40, 50, 60
The visibility is 40, 50, 60
Fig. 3. The structure diagram of the visibility observation system based on the constant temperature two-color light sources
The light source 1 and 2 are respectively separated from the camerasL 1 and L 2 (L 1>L 2)
The light source 1 and 2 are respectively separated from the cameras
Fig. 4. The light intensity measurement results of dual light sources. The inset: zoom in the partial image
Fig. 5. Visibility measurement results when the dual light sources are red light
L 1 is 20 m, L 2 is 50 m
Fig. 6. Visibility measurement results when the dual light sources are blue light
Fig. 7. Visibility measurement results of dual light sources method
Fig. 8. Visibility measurement results on a rainy day
Fig. 9. Visibility measurement results in the foggy day
Fig. 10. Visibility measurement results on a sunny day The inset: zoom in the partial image
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Table 1. The statistical errors
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