Research on Asphalt Pavement Surface Distress Image Measuring Method

An image measuring method of pavement distress is put forward in this paper.The pavement surface image is divided into subimages of 64×64 pixels and the intensity variances are used to represent the subimage feature.Based on the result of the pavement subimages model recognition,the pavement distress area measuring method is determined.When we measure the cracking width,firstly find out the most severe cracking subimages,then carry on median filter and binarization processing,finally measure cracking width through counting the pixels of subimage.