4.6 Article

PTRNet: Global Feature and Local Feature Encoding for Point Cloud Registration

期刊

APPLIED SCIENCES-BASEL
卷 12, 期 3, 页码 -

出版社

MDPI
DOI: 10.3390/app12031741

关键词

point cloud registration; local feature; global feature; Transformer; K-Nearest Neighbor

资金

  1. Network Collaborative Manufacturing Integration Technology
  2. Ministry of Science and Technology [2020YFB1712401]
  3. [Key Scientific Research Project of Colleges and Universities in Henan Province] [21A520042]
  4. [Major public welfare projects in Henan Province] [201300210500]

向作者/读者索取更多资源

This paper proposes an end-to-end point cloud registration network model called PTRNet, which improves the registration behavior by considering both local and global features. Experimental results show that PTRNet outperforms other methods in terms of average error and registration accuracy.
Existing end-to-end cloud registration methods are often inefficient and susceptible to noise. We propose an end-to-end point cloud registration network model, Point Transformer for Registration Network (PTRNet), that considers local and global features to improve this behavior. Our model uses point clouds as inputs and applies a Transformer method to extract their global features. Using a K-Nearest Neighbor (K-NN) topology, our method then encodes the local features of a point cloud and integrates them with the global features to obtain the point cloud's strong global features. Comparative experiments using the ModelNet40 data set show that our method offers better results than other methods, with a mean square error (MSE), root mean square error (RMSE), and mean absolute error (MAE) between the ground truth and predicted values lower than those of competing methods. In the case of multi-object class without noise, the rotation average absolute error of PTRNet is reduced to 1.601 degrees and the translation average absolute error is reduced to 0.005 units. Compared to other recent end-to-end registration methods and traditional point cloud registration methods, the PTRNet method has less error, higher registration accuracy, and better robustness.

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