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• W3215405533 endingPage "12198" @default.
• W3215405533 startingPage "12187" @default.
• W3215405533 abstract "This study addressed the problems of difficult parameter selection of ground point filtering algorithm, slow speed, and susceptibility to wrong classification points of traditional interpolation algorithm in extracting canopy height model (CHM) from dense point cloud produced by structure-from-motion (SfM). Finding the true ground is vital for canopy height estimation using UAV RGB point cloud, especially for semi-arid area where cloud points of short vegetation like shrubs and dwarf trees generally mixed up with the ground points. This paper proposes a ground point extraction strategy that combines the advantages of structural and spectral filtering. Specifically, spectral filtering simplifies the threshold selection for structural filtering, while structural filtering removes the outliers from spectral filtering. Considering the misclassified points in the ground filtering algorithm, a fast, nonparametric ground point interpolation algorithm was used to suppress the wrong classification points. This novel algorithm is based on the basic idea of least square quadratic fitting and prediction of terrain profile (PF). The quantitative results show that compared to Inverse Distance Weighting (IDW), Radial Basis Function (RBF), and Ordinary Kriging (OK), it takes less time (PF: 122s, IDW: 518s, RBF: 1374s, OK: 1129s), and has lower RMSE (PF: 0.301 m, IDW: 0.549 m, RBF: 0.903m, OK: 0.427m)." @default.
• W3215405533 created "2021-12-06" @default.
• W3215405533 creator A5001488193 @default.
• W3215405533 creator A5006992514 @default.
• W3215405533 creator A5020017153 @default.
• W3215405533 creator A5035478113 @default.
• W3215405533 creator A5061803854 @default.
• W3215405533 creator A5062823544 @default.
• W3215405533 creator A5080883951 @default.
• W3215405533 creator A5081705650 @default.
• W3215405533 date "2021-01-01" @default.
• W3215405533 modified "2023-10-16" @default.
• W3215405533 title "A process-oriented method for rapid acquisition of canopy height model from RGB point cloud in Semi-arid region" @default.
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• W3215405533 doi "https://doi.org/10.1109/jstars.2021.3129472" @default.

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