Fig. 1. (a) Original image and haze removal results after select different window sizes of (b) 10, (c) 50, and (d) 100

Fig. 2. (a) Original image and haze removal results after select different ω values of (b) 0.5, (c) 0.75, and (d) 0.95

Fig. 3. Discovery of "halo" phenomenon. (a) Original image; (b) dark channel of original image; (c) transmission ratio image; (d) haze removal result

Fig. 4. "Halo" phenomenon at sky edge. (a) Hazy image; (b) haze removal result

Fig. 5. (a) Hazy image and transmission ratio images with different filtering parameter r values of (b) 1, (c) 37, and (d) 100

Fig. 6. (a) Hazy image and haze removal results with different filtering parameter r values of (b) 1, (c) 37, and (d) 100

Fig. 7. (a) Hazy image and transmission ratio images with different adjustment parameter ε values of (b) 10-1, (c) 10-3, and (d) 10-6

Fig. 8. Comparison of (a) hazy image and (b) haze removal result without special sky treatment

Fig. 9. Haze removal results after sky treatment with different threshold A0 values of (a) 80, (b) 150, (c) 200, (d) 210, (e) 220,; (f) 230, (g) 240, and (h) 255

Fig. 10. Comparison of images with different interpolation methods. (a) Hazy image; (b) nearest neighbour interpolation; (c) bilinear interpolation; (d) cubic convolution interpolation

Fig. 11. Comparison of transmission ratio images (a) without and (b) with interpolation method when N=5

Fig. 12. (a) Original images and haze removal results with different algorithms of (b) histogram equalization, (c) Retinex, (d) He algorithm, (e) He algorithm combined with guided-filter, and (f) proposed algorithm