Application of the Gradient-Based 3D Patch Extraction Method to Terrain and Man-made Objects for Construction of 3D CyberCity

3차원 사이버도시구축을 위한 그래디언트기반 3차원 평면추출기법의 지형 및 인공지물지역에의 적용에 관한 연구

This study presents an application of the 3D patch extraction method which is based on gradient-driven properties to obtain 3D planar patches over the terrain and man-made objects from lidar data. The method which was exploited in this study is composed of a sequence of processes: segmentation by slope, initiation of triggering patches by mode selection, and expansion of the triggering patches. Since urban areas contain many planar regions over the terrain surface, application of the method has been experimented to extract 3D planar patches not only from non-terrain objects but also from the terrain. The experimental result shows that the method is efficient to acquire 3D planar patches.