Abstract:Dimensional quality inspection is a necessary step for finished residences before delivery, but traditional manual inspection methods are time-consuming and labor-intensive. As automated dimensional quality inspection utilizing terrestrial laser scanners receives more attention, automated multi-view point cloud registration of indoor scenes becomes more important. Due to the fact that posting targets indoors is inefficient and a large number of repetitive structures fill the indoor scenes of finished residence, it is not suitable to rely solely on natural geometric primitives or top views for target-less registration. In this paper, a deep learning-based automated multi-view point cloud registration method for indoor scenes is proposed. Firstly, the PointAF neural network is utilized to semantically segment the scanned point cloud data, and then instance segmentation is performed to obtain point cloud instances with different structures. Subsequently, pairwise registration is performed to compute the transformation parameters using the door instances. False matches are removed by an evaluation function based on overlapping confidence and conflict constraints. Finally, multi-view registration is achieved using a spanning tree based sequential registration method. In the validation and comparison experiments, a total of 21 stations of scanned point cloud data from 2 sets of finished residences are utilized to demonstrate the effectiveness and accuracy of the proposed method.