Fig. 7
From: Cloth simulation-based construction of pit-free canopy height models from airborne LiDAR data
Cloth simulation process. a Initial state. A piece of cloth is placed above the height-normalised forest LiDAR measurements. b Each particle drops to the LiDAR measurements under the influence of external force, and their displacement is calculated. If the cloth particles collide with the measurements, then these particles will stop falling and be labelled unmovable. c Each movable particle is moved under the influence of internal force produced by the neighbouring particles. Steps (b) and (c) are repeated until the maximum height variation of all particles is sufficiently small. d Final state. The shape of the cloth is regarded as the pit-free CHM