ZHOU Baoding,HUANG Qianfeng,SONG Jiangbo,et al.Semantic Segmentation Method of Bridge Point Clouds Based on Curvilinear Features and Attention Mechanism[J].Journal of Geomatics,2026,51(5):169-179
ZHOU Baoding,HUANG Qianfeng,SONG Jiangbo,et al.Semantic Segmentation Method of Bridge Point Clouds Based on Curvilinear Features and Attention Mechanism[J].Journal of Geomatics,2026,51(5):169-179DOI: 10.14188/j.2095-6045.20250492.
Semantic Segmentation Method of Bridge Point Clouds Based on Curvilinear Features and Attention Mechanism
Effective extraction of semantic information plays a crucial role in the analysis of bridge point cloud models; however, raw point cloud data acquired through 3D laser scanning generally suffers from semantic gaps. Therefore, this paper constructs a standardized point cloud semantic segmentation dataset based on open-source bridge data and evaluates the segmentation performance of mainstream point cloud semantic segmentation algorithms in complex bridge scenarios. To address the weaknesses in local feature extraction and insufficient long-range dependency modeling of mainstream algorithms such as PointNet++, DGCNN, and CurveNet in bridge point cloud segmentationm, this paper proposes a bridge point cloud semantic segmentation algorithm, BCA-Net, based on long-range curve features and an attention mechanism, which enhances the expressive power of local features and significantly improves the segmentation accuracy of bridge point clouds. The effectiveness of the BCA-Net algorithm is verified through the constructed bridge point cloud dataset.
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