DEVELOPMENT OF A POLYGONIZATION METHOD FOR RAIL STRUCTURES OF MONORAIL BY USING CENTER LINE AND CROSS SECTION

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  • スケルトンと断面を利用したモノレールのレール部点群のポリゴンモデル化手法の開発

Abstract

 This research proposes a method of polygonization by using point cloud of rail of monorail. It is not easy to polygonization of monorail due to its long and large structure. Especially, rails are difficult to scan by laser scanner because they are placed in very high. Therefore, it is not expected to efficiently polygonize of rail for maintenance. In our proposed method, a center line which is robust in defects of point cloud is extracted based on geometric symmetry. When the center line is calclurated, polygon is created in easy by sweeping a cross section of input data along the center line. The proposed method enables not only to create well-formed polygons for maintance but also to cover defects of input point cloud. In this paper, we also show results for point cloud data of monorail scanned by mobile mapping system to validate the proposed method.

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