Cloth simulation-based construction of pit-free canopy height models from airborne LiDAR data

Forest Ecosystems

Table 3 Accuracy comparison between different algorithms for filling pits (unit: m)

Landscapes	Pit proportion	Raw CHM	Mean	Median	Our algorithm
Hemisphere	10%	0.5428	0.4334	0.308	0.2031
	20%	0.7562	0.5391	0.3753	0.2783
	30%	0.9329	0.6652	0.5098	0.357
	40%	1.0685	0.787	0.6747	0.4248
	50%	1.1948	0.9217	0.8752	0.4648
	60%	1.2882	1.0299	1.0324	0.5209
	On average	0.9639	0.7294	0.6292	0.3748
Cone	10%	1.304	0.7299	0.5077	0.4135
	20%	1.8507	1.0731	0.7426	0.4814
	30%	2.2675	1.4123	1.0503	0.5753
	40%	2.6308	1.7823	1.5198	0.6553
	50%	2.9588	2.1623	2.0756	0.7523
	60%	3.1292	2.3931	2.4199	0.8503
	On average	2.3568	1.5922	1.386	0.6214