Analysis of City Range Image Using Digital Map

In existing research about 3D city map, geometrical information of buildings’ facade is derived from video image. In order to improve quality of the geometrical information, range image is used in our research. At first range image of existing buildings is acquired using laser scanners mounted on data acquisition vehicle which runs in the street. After removing obstacles from original range image, edge detection based segmentation can be used to extract range image of different buildings. Through matching patterns from edge map with that from existing 2D digital map, one building’s corresponding range image can be determined. Thus precise geometrical information of the building’s facade can be obtained from its corresponding range image. Keyword Range Image, Digital Map, City Range Image, Range Image Segmentation, Canny Edge Detector, DP Matching