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Generating Pit-free Canopy Height Models from Airborne Lidar

Khosravipour, Anahita, Skidmore, Andrew K., Isenburg, Martin, Wang, Tiejun, Hussin, Yousif A.·2014·Photogrammetric Engineering & Remote Sensing

Abstract

Canopy height models (CHMs) derived from lidar data have been applied to extract forest inventory parameters. However, variations in modeled height cause data pits, which form a challenging problem as they disrupt CHM smoothness, negatively affecting tree detection and subsequent biophysical measurements. These pits appear where laser beams penetrate deeply into a tree crown, hitting a lower branch or the ground before producing the first return. In this study, we develop a new algorithm that generates a pit-free CHM raster, by using subsets of the lidar points to close pits. The algorithm operates robustly on high-density lidar data as well as on a thinned lidar dataset. The evaluation involves detecting individual trees using the pit-free CHM and comparing the findings to those achieved by using a Gaussian smoothed CHM. The results show that our pit-free CHMs derived from high-and low-density lidar data significantly improve the accuracy of tree detection.

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Metadata

Authors
Khosravipour, A., Skidmore, A. K., Isenburg, M., Wang, T., & Hussin, Y. A.
Venue
Photogrammetric Engineering & Remote Sensing
Published
2014-09-01
Volume
80
Issue
9
Pages
863-872
ISSN
0099-1112
Cited by
347
References
0
Language
en

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CoChat. (2026). Citation check: Generating Pit-free Canopy Height Models from Airborne Lidar. https://app.cochat.ai/papers/10.14358/pers.80.9.863
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Khosravipour, A., Skidmore, A. K., Isenburg, M., Wang, T., & Hussin, Y. A. (2014). Generating Pit-free Canopy Height Models from Airborne Lidar. Photogrammetric Engineering & Remote Sensing. https://doi.org/10.14358/pers.80.9.863