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Neighborhood-attention and topology-aware graph convolution method for robust point cloud registration
Mengnan XU, Hailiang YE, Feilong CAO
Journal of Computer Applications    2025, 45 (11): 3573-3582.   DOI: 10.11772/j.issn.1001-9081.2024111625
Abstract49)   HTML1)    PDF (3219KB)(5)       Save

Most existing point cloud registration methods often ignore the relationship between neighboring nodes in the neighborhood, resulting in insufficient feature extraction of local geometric structures. To solve this problem, a Neighborhood-Attention and Topology-Aware graph convolution (NATA) method for robust point cloud registration was proposed to capture deeper semantic features and richer geometric information. Firstly, a cascade geometry-aware module was designed, which used a self-attention-based local neighborhood update graph convolution module to focus on the intrinsic geometric structure of local graphs, thereby obtaining more accurate local topological information. Secondly, a cascade structure combined various levels of local topological information to produce a more discriminative collection of local descriptors. Finally, a feature interaction-graph update module was proposed, which created an attention mechanism in the point clouds to capture their implicit relationships and perceive shape features of the point clouds. Experimental results on a challenging 3D point cloud benchmark test show that the proposed method achieves excellent Mean Absolute Error (MAE) of 0.157 2 and 0.154 4 for partial noisy point clouds registration under unknown shapes and unknown categories, respectively.

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