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

Table 7

Transmittance differences of R-G channels after defogging with different algorithms.

Figure 13	Ratio of t difference of R-G channels	Dark channel (%)	Guided filtering (%)	Meng (%)	DEFADE (%)	Tarel (%)	Chen (%)
Image 7	0–0.1	94.33	93.53	91.64	90.64	97.44	97.23
	0.1–0.2	5.66	6.42	8.29	9.28	2.5	2.77
	0.2–0.3	0.01	0.05	0.07	0.08	0.06	0
	0.3–0.5	0	0	0	0	0	0
	>0.5	0	0	0	0	0	0
Image 8	0–0.1	80.53	81.88	84.28	86.70	78.42	96.61
	0.1–0.2	17.28	16.52	13.54	12.95	21.41	3.39
	0.2–0.3	1.84	1.58	2.18	0.35	0.17	0
	0.3–0.5	0.35	0.02	0	0	0	0
	>0.5	0	0	0	0	0	0
Image 9	0–0.1	43.21	42.89	58.26	31.43	14.53	67.79
	0.1–0.2	41.25	40.80	29.91	41.29	57.04	24.22
	0.2–0.3	14.29	15.18	11.23	16.47	20.57	7.78
	0.3–0.5	1.25	1.12	0.6	10.68	7.83	0.21
	>0.5	0	0.01	0	0.12	0.03	0
Image 10	0–0.1	57.84	54.82	48.48	57.12	42.17	60.58
	0.1–0.2	41.96	44.94	38.94	41.96	49.83	38.99
	0.2–0.3	0.19	0.22	12.54	0.19	8.00	0.43
	0.3–0.5	0	0.01	0.04	0	0	0
	>0.5	0	0	0	0	0	0