Fast Image Defogging Method Based on Dark Channel and Global Estimation

Xianzhen Sang; Hongtai Zhu; Hu Cheng; Ye Zhang

doi:10.3788/LOP202259.1010006

Journals >Laser & Optoelectronics Progress >Volume 59 >Issue 10 >Page 1010006 > Article

Laser & Optoelectronics Progress
Vol. 59, Issue 10, 1010006 (2022)

Fast Image Defogging Method Based on Dark Channel and Global Estimation

Xianzhen Sang^**, Hongtai Zhu^*, Hu Cheng, and Ye Zhang

Author Affiliations

The 58th Research Institute of China Electronics Technology Group Corporation, Wuxi 214072, Jiangsu , China

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DOI: 10.3788/LOP202259.1010006 Cite this Article Set citation alerts

Xianzhen Sang, Hongtai Zhu, Hu Cheng, Ye Zhang. Fast Image Defogging Method Based on Dark Channel and Global Estimation[J]. Laser & Optoelectronics Progress, 2022, 59(10): 1010006 Copy Citation Text

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Fig. 1. Atmospheric scattering model

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Fig. 2. Image defogging effect of dark channel method. (a) Original foggy image; (b) transmittance map; （c） image after defogging

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Fig. 3. Flow chart of the proposed algorithm

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Fig. 4. Relationship between

I_{m i n}^{c} (x)

and

J_{m i n}^{c} (x)

. (a) Foggy image; (b) the fog component in the image is small; (c) the fog component in the image is large

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Fig. 5. Dehazing results of hazy images with abrupt change of depth of field and sky region by different methods. (a) Original foggy image; (b) DC-GF method; (c) Zhu's method; (d) Berman's method; (e) Cai's method; (f) Chen's method; (g) DC-GE method

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Image	Method	Effective detail intensity	Hue restoration degree	Structural similarity	Comprehensive evaluation
Img 1	DC-GF	0.394	0.513	0.834	0.169
	Zhu	0.369	0.74	0.937	0.256
	Berman	0.267	0.781	0.84	0.175
	Cai	0.406	0.653	0.916	0.243
	Chen	0.376	0.818	0.897	0.276
	DC-GE	0.408	0.561	0.868	0.199
Img 2	DC-GF	0.664	0.608	0.568	0.229
	Zhu	0.652	0.532	0.703	0.244
	Berman	0.501	0.529	0.517	0.137
	Cai	0.653	0.597	0.654	0.255
	Chen	0.608	0.623	0.693	0.262
	DC-GE	0.667	0.612	0.609	0.249
Img 3	DC-GF	0.370	0.625	0.797	0.192
	Zhu	0.365	0.681	0.863	0.214
	Berman	0.306	0.661	0.781	0.158
	Cai	0.386	0.637	0.914	0.225
	Chen	0.357	0.771	0.957	0.263
	DC-GE	0.389	0.656	0.810	0.207
Img 4	DC-GF	0.583	0.543	0.689	0.218
	Zhu	0.510	0.54	0.791	0.218
	Berman	0.519	0.678	0.723	0.254
	Cai	0.502	0.36	0.838	0.151
	Chen	0.523	0.602	0.851	0.268
	DC-GE	0.516	0.86	0.847	0.376
Img 5	DC-GF	0.302	0.524	0.817	0.129
	Zhu	0.28	0.687	0.866	0.167
	Berman	0.271	0.65	0.696	0.123
	Cai	0.32	0.759	0.898	0.218
	Chen	0.358	0.542	0.879	0.171
	DC-GE	0.283	0.773	0.832	0.182
Img 6	DC-GF	0.483	0.61	0.706	0.208
	Zhu	0.569	0.844	0.685	0.329
	Berman	0.458	0.549	0.57	0.143
	Cai	0.469	0.583	0.844	0.231
	Chen	0.506	0.681	0.753	0.259
	DC-GE	0.472	0.651	0.765	0.235

Table 1. Effective detail intensity, hue restoration degree, structural similarity and comprehensive evaluation of the obtained image

Images	Img 1			Img 2			Img 3			Img 4			Img 5			Img 6
Method	DC-GF	DC-GE		DC-GF	DC-GE		DC-GF	DC-GE		DC-GF	DC-GE		DC-GF	DC-GE		DC-GF	DC-GE
Time /s	0.405	0.094		0.452	0.109		1.479	0.234		0.577	0.078		1.513	0.265		0.624	0.109

Table 2. Processing time of the algorithm

Xianzhen Sang, Hongtai Zhu, Hu Cheng, Ye Zhang. Fast Image Defogging Method Based on Dark Channel and Global Estimation[J]. Laser & Optoelectronics Progress, 2022, 59(10): 1010006

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