Study on Air Void Characteristics and Hydraulic Characteristics of Porous Asphalt Concrete Based on Image Processing Technology

Table 1

Proportion of pore structures that connected with the outside space (%).

Sample		I	II	III	IV
Without dodging		13.10	14.88	21.67	25.12
		34.89	7.15	7.30	3.26
2D gamma		12.93	14.42	21.03	24.47
		33.18	3.85	4.12	5.77
MASK		13.05	15.11	22.27	25.89
		34.44	8.80	10.23	0.27
Retinex		18.25	21.53	29.13	30.21
		87.99	55.04	44.21	16.33
Homomorphic		13.28	15.08	21.91	25.35
		36.82	8.60	8.47	2.37
		9.71	13.89	20.20	25.97