A CRACK DETECTION METHOD IN A LASER IMAGE OF ROAD SURFACE

Abstract

In this paper, a new crack detection method in a laser image of road surface is proposed. The advantage of using a laser imaging system to extract a crack is that a laser image is free from lighting condition problem. And also a laser image has a tendency to be a low contrast image, which can be a cause of difficulty in detecting cracks. In addition to that, a crack of the road surface has wide variation in shape, depth and width. So the crack detecting method should be tolerant to low contrastness and crack variations. By introducing morphological operations, proposed method achieves high accuracy of detecting crack. And a discrimination method between linear and planar crack is also proposed.