Extraction of road markings from aerial images

We propose a method of extracting road markings, such as crosswalks, from aerial images. The purpose of our study is to extract road markings to store them as a map. We use aerial images for automatically obtaining road markings over a wide area at one time, and we use the digital maps to extract the road areas in the aerial images. We can process the images without the effect of the town blocks in the aerial images by using the digital map. In addition, we recognize the type of road markings using edge directions and shape features of extracted road markings. In this study, we extract and recognize crosswalks and traffic lane lines.