Awesome

R package that wraps the CSF algorithm for Airborne LiDAR ground filtering based on Cloth Simulation. It is made to work along with the lidR package.

Example using lidR

library(lidR)

file <- system.file("extdata", "Topography.laz", package="lidR")
las  <- readLAS(file, select = "xyz")
las  <- classify_ground(las, csf())

plot(las, color = "Classification")

Reference

W. Zhang, J. Qi*, P. Wan, H. Wang, D. Xie, X. Wang, and G. Yan, “An Easy-to-Use Airborne LiDAR Data Filtering Method Based on Cloth Simulation,” Remote Sens., vol. 8, no. 6, p. 501, 2016