Visibility Detection Algorithm of Single Fog Image Based on the Ratio of Wavelength Residual Energy

Table 4

The ratio of observed visibility.

	Actual observation value (km)	PTZ algorithm (km)	Curve response fitting algorithm (km)	Algorithm of this paper (km)
Scene 1	0.72	0.80	0.75	0.69
Scene 2	1.29	1.41	1.35	1.31
Scene 3	3.48	3.08	3.83	3.11
Scene 4	2.66	2.86	2.89	2.49