Bulletin of Surveying and Mapping ›› 2021, Vol. 0 ›› Issue (9): 15-20,27.doi: 10.13474/j.cnki.11-2246.2021.0266

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3D point cloud indoor plane element extraction and optimization methodology

SONG Jinyang1, QIAN Jianguo1, TANG Shengjun2,3,4,5, WANG Weixi2,3,4,5, LI Xiaoming2,3,4,5   

  1. 1. School of Geomatics, Liaoning Technical University, Fuxin 123000, China;
    2. Institute of Smart City, School of Architecture and Urban Planning, Shenzhen University, Shenzhen 518061, China;
    3. Key Laboratory of Urban Land Resources Monitoring and Simulation, Ministry of Natural Resources, Shenzhen 518061, China;
    4. Key Laboratory of Spatial Information Intelligent Perception and Service, Shenzhen 518061, China;
    5. Key Laboratory of Urban Spatial Information Engineering, Guangdong Province, Shenzhen 518061, China
  • Received:2020-09-01 Online:2021-09-25 Published:2021-10-11

Abstract: The accurate extraction and relationship restoration of indoor plane elements is an important basis for the automatic semantic reconstruction of indoor models. This paper proposes an indoor plane element extraction and optimization method for complex three-dimensional point clouds, which firstly uses area growth and RANSAC planar hybrid segmentation methods to segment indoor point cloud data; and then uses spatial location information of indoor semantic components as well as bounding box and normal vector information, the planar elements of the segmented plane are extracted accurately; then the extracted walls are optimized to achieve the merging of shared walls and solve the problem of indoor wall redundancy; finally, the spatial location information of doors and walls is used to restore the door-wall association relationship. In the experimental part, two sets of experimental data are used:one set is the laser point cloud data of a teaching floor of Shenzhen University, the other set is the standard data of International Society for Photogrammetry and Remote Sensing (ISPRS), and the validity and reliability of the method of this paper are verified by evaluating the experimental results.

Key words: indoor point clouds, plane hybrid segmentation, plane element extraction, shared wall merging, door-wall correlations

CLC Number: