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- W2003012295 abstract "With the advent of sophisticated and diversified car navigation systems in recent years, it is becoming increasingly important to construct a precise and detailed map database. Among map data, road-network information is a representation of the connection relations of roads by a graph structure, and is one of the most important kinds of information used in route search and guidance, which is the basic function of car navigation systems. At present, much manpower and time are being spent in the preparation of road-network information, and it is desirable to reduce the labor required by automation using computers. This paper presents a method in which the road network is automatically extracted from map information. First, the road area is extracted from the map image by stochastic relaxation based on the geometrical properties of the road area and the background area. Then, thinning and piecewise-linear approximation are applied to the road area to extract the road-network information, which consists of the graphic structure of nodes and links. In this process, the distortion near junctions produced by thinning is corrected, and the nodes are optimally rearranged so that the road network represents the centers of the roads. Then, precise road-network information is stably extracted. © 2003 Wiley Periodicals, Inc. Electron Comm Jpn Pt 2, 86(4): 62–72, 2003; Published online in Wiley InterScience (www.interscience. wiley.com). DOI 10.1002/ecjb.10144" @default.
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- W2003012295 date "2003-03-11" @default.
- W2003012295 modified "2023-10-14" @default.
- W2003012295 title "Automatic extraction of road networks from map images" @default.
- W2003012295 doi "https://doi.org/10.1002/ecjb.10144" @default.
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