一种邻接区域平面元融合的桥面分割方法

针对桥梁点云的桥面分割问题，提出一种邻接区域平面元融合的桥面分割方法。首先对点云进行体素化处理获得体素点云，利用超体素空间和法线约束准则进行桥梁点云过分割；然后利用面片法线的方向和模长进行面片过滤，获得包含桥面的候选面片；最后对候选面片进行邻接区域平面元融合，使用统计分布方法筛选融合区域，获得桥面点云。实验证明，该方法可以有效分割桥梁点云的桥面，稳定性较高且能保留体素化前的原始数据。相较于区域生长法和超体素区域生长法，该方法在跨区域融合方面有较好的抑制作用，更适用于桥梁点云的桥面分割。

A Bridge Deck Segmentation Method Based on Fusion of Plane Elements in Adjacent Regions

Aiming at the problem of bridge deck segmentation of bridge point cloud, we propose a bridge deck segmentation method based on the fusion of plane elements in adjacent regions. Firstly, the point cloud is voxelized to obtain the voxel point cloud, and the supervoxel space and normal constraint criteria are used to over-segment the bridge point cloud. Then, we use the direction of the patch normal and the model length to perform the patch filter to obtain the candidate patch containing the bridge deck. Finally, we perform the plane element fusion of the adjacent area on the candidate patch and use the statistical distribution method to filter the fusion area to obtain the bridge deck point cloud. Experiments show that the method in this paper can effectively segment the bridge deck of the bridge point cloud, has high stability, and retains the original data before voxelization. Compared with the region growing and the supervoxel region growing methods, the method in this paper integrates across regions. It has a better inhibitory effect and is more suitable for bridge deck segmentation of bridge point clouds.