A method for extracting point cloud contours of plane building components based on global graph clustering
A technology for extracting building components and contours, applied in the computer field, can solve problems such as difficulty in applying small curved surfaces to extract scenes, difficulty in determining the starting and ending range of intersection lines, etc., and achieves the effect of strong adaptability and high precision
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[0049] The implementation of the planar reconstruction method proposed by the present invention includes two main stages: detection and extraction of planar segments and geometric modeling of planar segments. Specifically, the first stage can be divided into point cloud segmentation and plane detection. For segmentation, a bottom-up point cloud segmentation method is proposed, which utilizes supervoxel structure and global graph-based optimization to achieve automatic and unsupervised segmentation of point clouds. A flatness-based extraction is performed on the segments in a subsequent step, and only planar segments and their neighborhoods are selected as candidates for planar fitting. The points of the plane can be identified by the parametric model given by the flatness calculation. The boundary points of the plane are then extracted by the Alpha shape. The resulting base line segments are extracted and merged by mean shift clustering. For the geometric modeling of the pl...
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