中文

Journal of Applied Sciences >

2025 , Vol. 43 >Issue 6: 922 - 934

DOI: https://doi.org/10.3969/j.issn.0255-8297.2025.06.003

Signal and Information Processing

Aerial Image-Guided LiDAR Point Cloud Semantic Segmentation

  • LIU Yongchang ,
  • DU Yiying ,
  • WU Cuiying ,
  • LIU Yawen
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  • School of Remote Sensing and Information Engineering, Wuhan University, Wuhan 430079, Hubei, China

Received date: 2024-08-21

  Online published: 2025-12-19

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Abstract

The point cloud semantic segmentation model that integrates multi-source data has significantly improved the classification accuracy of point clouds in areas with mixed ground objects. How to effectively fuse features of different modalities is a key and difficult issue in multi-modal point cloud semantic segmentation. Aiming at urban ground objects, this paper proposed a monocular aerial image-guided LiDAR point cloud semantic segmentation network (IG-Net). This network extracted multi-scale and multi-level features and contextual information from aerial images and LiDAR data and utilized the aerial image features to perform attention-guided weighted fusion on the LiDAR point cloud features, thereby enhancing the expression ability of point features and optimizing the semantic segmentation results of LiDAR point clouds. The proposed model achieved favorable results on the experimental dataset. Compared with the benchmark model RandLANet, its overall accuracy increased by 2.32%, mean intersection over union by 2.58%, and mean F1 score by 2.13%.

Key words： image-guided point cloud semantic segmentation; feature fusion of point cloud and image; multi-modal semantic segmentation model

Cite this article

LIU Yongchang , DU Yiying , WU Cuiying , LIU Yawen . Aerial Image-Guided LiDAR Point Cloud Semantic Segmentation[J]. Journal of Applied Sciences, 2025 , 43(6) : 922 -934 . DOI: 10.3969/j.issn.0255-8297.2025.06.003

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