Individual Tree Crown Segmentation of a Larch Plantation Using Airborne Laser Scanning Data Based on Region Growing and Canopy Morphology Features

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

  • Zhenyu Ma
  • Yong Pang
  • Di Wang
  • Xiaojun Liang
  • Bowei Chen
  • Hao Lu
  • Holger Weinacker
  • Barbara Koch

Organisaatiot

  • Chinese Academy of Forestry
  • University of Freiburg
  • Chinese Academy of Sciences
  • Beijing Forestry University

Kuvaus

The detection of individual trees in a larch plantation could improve the management efficiency and production prediction. This study introduced a two-stage individual tree crown (ITC) segmentation method for airborne light detection and ranging (LiDAR) point clouds, focusing on larch plantation forests with different stem densities. The two-stage segmentation method consists of the region growing and morphology segmentation, which combines advantages of the region growing characteristics and the detailed morphology structures of tree crowns. The framework comprises five steps: (1) determination of the initial dominant segments using a region growing algorithm, (2) identification of segments to be redefined based on the 2D hull convex area of each segment, (3) establishment and selection of profiles based on the tree structures, (4) determination of the number of trees using the correlation coefficient of residuals between Gaussian fitting and the tree canopy shape described in each profile, and (5) k-means segmentation to obtain the point cloud of a single tree. The accuracy was evaluated in terms of correct matching, recall, precision, and F-score in eight plots with different stem densities. Results showed that the proposed method significantly increased ITC detections compared with that of using only the region growing algorithm, where the correct matching rate increased from 73.5% to 86.1%, and the recall value increased from 0.78 to 0.89.

Yksityiskohdat

AlkuperäiskieliEnglanti
Artikkeli1078
Sivumäärä21
JulkaisuRemote Sensing
Vuosikerta12
Numero7
TilaJulkaistu - 1 huhtikuuta 2020
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

Lataa tilasto

Ei tietoja saatavilla

ID: 41762909