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A Study on Deep Learning-Based Instance Segmentation and Feature Extraction of Urban Trees Using 3D LiDAR Data

  • Journal of Internet of Things and Convergence
  • Abbr : JKIOTS
  • 2026, 12(4), 21
  • Publisher : The Korea Internet of Things Society
  • Research Area : Engineering > Computer Science > Internet Information Processing
  • Received : June 16, 2026
  • Accepted : August 19, 2026
  • Published : August 31, 2026

Jung in-hye 1

1대진대학교

Accredited

ABSTRACT

Traditional labor-intensive tree surveys involve substantial time and cost and may produce inconsistent results due to surveyors’ subjective judgments. To overcome these limitations, this study integrates high-resolution 3D mobile LiDAR (Light Detection and Ranging) point cloud data with deep learning to automate urban object classification, individual tree isolation, and species identification. The PointNet++ model was applied to learn hierarchical spatial features directly from point cloud data. Semantic segmentation was first used to distinguish trees from buildings and other artificial structures, followed by instance segmentation to assign a unique ID to each tree. Cross-sectional data at 1.2–1.3 m above ground were then extracted, and stem points were refined using DBSCAN clustering to calculate diameter at breast height and tree height automatically. Experiments conducted along a 6 km corridor in Suwon, Gyeonggi-do, produced a structural attribute database for 1,252 street trees. Validation against field measurements showed that 64.7% of the classified trees had an error rate below 15%. These findings demonstrate the potential of the proposed method to improve forest inventory efficiency and support intelligent urban tree resource management.

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