A Double-threshold Elevation-based Point Cloud Ground Point Filtering Method
Ground point filtering is one of the important aspects of point cloud data processing.This paper combines the elevation distri-bution characteristics of 3D laser point clouds and proposes a ground point filtering method for point clouds based on elevation double threshol-ding,which takes advantage of the differences in elevation values of ground points and non-ground points,and sets large scale elevation thresholds and small scale elevation thresholds respectively to achieve the separation of ground points and non-ground points.Combined with the ISPRS data set,the influence of the control parameters(grid size,preset slope,standard deviation multiplier)on the filtering accuracy in this paper's algorithm is studied,and on this basis,the feasibility and applicability of this paper's algorithm are verified by the comparative a-nalysis of the accuracy of different filtering algorithms.
point cloudelevation double thresholdingcontrol parametersground points filteringaccuracy analysis
万方数据
维普
