3D reconstruction of cross-scale narrow space with thin structure
Lei Han, Youquan Liu · Thirteenth International Conference on Graphics and Image Processing (ICGIP 2021) · 2022
This paper proposes a 3D reconstruction method for the cross-scale narrow space containing thin structure. This method takes monocular image sequences as input and respectively constructs large-scale scene point cloud of main part based on incremental SfM and small-scale thin structure point cloud based on the curve method. The small-scale thin structure point cloud reconstructed individually alleviates the defect of incomplete point cloud from the large-scale scene. By introducing PCA for initial registration, alternatively iterating the closest point algorithm and the global optimization algorithm, we achieve a more precise registration for the thin structure point cloud. Then, a replacement algorithm is used to fuse it with the point cloud of the main part. The experiment containing two scenes verifies the effectiveness of our method, which reconstructs point cloud of the thin structure with high accuracy and retains the overall 3D information of the scene at the same time.