A method for enhancing the density of laser radar point clouds in steep slope forest regions

Abstract

This invention discloses a method for enhancing the density of point cloud data in steep forest slopes using lidar, belonging to the field of geographic data acquisition technology, and solving the problem of low density of point cloud data acquired by existing technologies. The method includes: S1, determining a first flight path of an airborne lidar based on the terrain information of the steep forest slope, and collecting first point cloud data of the steep forest slope using the airborne lidar along the first flight path; S2, constructing a digital elevation model (DEM) of the steep forest slope based on the first point cloud data and determining the contour line distribution information on the DEM; S3, extracting multiple terrain feature points at different elevations in the DEM based on the contour line distribution information, and determining a second flight path of the airborne lidar based on all terrain feature points; S4, collecting second point cloud data of the steep forest slope using the airborne lidar along the second flight path, and determining the increased density point cloud data of the steep forest slope based on the second point cloud data and the first point cloud data. This invention is used to enhance the density of point cloud data.

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