The filtration method of cliff point cloud vegetation based on the surface orthographic projection
[1]Li Cailin,Chen Wenhe,Wang Jiangmei,et al.The filtration method of cliff point cloud vegetation based on the surface orthographic projection[J].Journal of Zhengzhou University (Engineering Science),2016,37(06):77-82.[doi:10.13705/j.issn.1671-6833.2016.06.005]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
37
Number of periods:
2016 06
Page number:
77-82
Column:
Public date:
2016-12-31
- Title:
- The filtration method of cliff point cloud vegetation based on the surface orthographic projection
- Keywords:
- 3 D laser scanning; cliff point cloud; vegetation filtration; surface orthographic projection; DTM
- CLC:
- -
- Abstract:
- Cliff and steep slope are important landscape elements of topographic map, and these elements play a very important role in the construction of the ecological environment and prevention of geological disasters, etc. However, it is unfavorable to observe and process data because of vegetation occlusion on cliff. In this paper, we present a cliff vegetation filtration method based on the principle of surface orthographic projection. Firstly, transform the original three dimensional point cloud of cliff to the spatial cartesian coordinate system, whose xy plane is the cliff face and z-axis is perpendicular to the direction of the cliff surface. Then the grid on the xy plane is divided to establish local grid Digital Terrain Model ( DTM) by fitting surface, and the vegeta-tion points can be extracted through setting a reasonable distance threshold. Finally, after inverse projection transformation, cliff rocky points preserved are mapped to the original spatial coordinate system. The experi-mental analysis using actual cliff point cloud data shows that the cliff point cloud vegetation filtering method based on the surface orthographic projection is feasible and effective.
- References:
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