LIDAR filtering based on morphological watershed and region growing

The morphology watershed is an effective method of image segmentation. This filter algorithm is as follows: First, basing on elevation information, discrete data point cloud should be turned into a gray image, Then it be pre-filtered with morphological watershed, because of the excessive separate phenomena of watershed morphology, Finally we use the region growing to eliminate or reduce its negative effects. The algorithm does not need to interpolate original data, without iteration, and speed is good. Experimental results show that this filter process can be programmed to obtain the goal of automation and certain accuracy.