Automatic DEM generation from aerial lidar data using multiscale support vector machines

Jun Wu; Lijuan Liu

doi:10.1117/12.901570

23 November 2011 Automatic DEM generation from aerial lidar data using multiscale support vector machines

Jun Wu, Lijuan Liu

Proceedings Volume 8006, MIPPR 2011: Remote Sensing Image Processing, Geographic Information Systems, and Other Applications; 800609 (2011) https://doi.org/10.1117/12.901570
Event: Seventh International Symposium on Multispectral Image Processing and Pattern Recognition (MIPPR2011), 2011, Guilin, China

Abstract

Automatic generation of DEM from LIDAR point clouds is attractive to photogrammetry community. This paper explores the possibility of using Multi-Scale SVM technique to classify untextured Lidar data into ground points and non-ground points so that DEM can be generated efficiently. First, irregular LIDAR point clouds are rasterized and a set of features including local height variation, min/max slope, plane flatness/direction and laser return intensity are generalized as well. Second, we establish Multi-Scale SVM classification levels by implementing SVM classier at different scale-space of Lidar data and one defined conditional probabilistic model is computed to make final classification. Finally, adaptive medium filter is implemented to smooth the isolated ground points mixed with little non-ground points and because the removal of non-ground points left quite a lot "blank holes", we further triangulate smoothed non-ground points to generate DEM automatically. The experimental results prove to be quite significant for real applications.

Citation Download Citation

Jun Wu and Lijuan Liu "Automatic DEM generation from aerial lidar data using multiscale support vector machines", Proc. SPIE 8006, MIPPR 2011: Remote Sensing Image Processing, Geographic Information Systems, and Other Applications, 800609 (23 November 2011); https://doi.org/10.1117/12.901570

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KEYWORDS

LIDAR

Clouds

Digital filtering

Raster graphics

Algorithm development

Data modeling

Binary data

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