Determination of LIDAR Points Cloud Filtering Parameters Using Distance Image

Filtering of LIDAR points cloud is the key of obtaining precise DEM and it has become a studying focus. Determination of the filtering parameters affects the results directly. Within this paper, it is proposed that making use of pixel position and grey information in distance image to guide determination of the filtering parameters like the block size and the threshold value. And the method is validated by a kind of filtering using the determined parameters. In experiment it is shown that this method is available.