An indoor building three-dimensional modeling method and device based on point cloud data
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A technology of point cloud data and 3D modeling, which is applied in the field of 3D laser scanning technology and 3D modeling, can solve the problems of low efficiency and achieve the effect of improving modeling efficiency
Inactive Publication Date: 2019-06-14
WUHAN UNIV
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[0007] In view of this, the present invention provides a method and device for three-dimensional modeling of indoor buildings based on point cloud data, to solve or at least partially solve the technical problems of low efficiency in the methods of the prior art
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Embodiment 1
[0054] This embodiment provides a 3D modeling method for indoor buildings based on point cloud data, please refer to figure 1 , the method includes:
[0055] First, step S1 is performed: acquiring 3D point cloud data of indoor buildings.
[0056] Specifically, the 3D point cloud data of indoor buildings acquired in step S1 includes: single-station or multi-station registration and mosaic point cloud data of terrestrial 3D laser scanners, multi-view image (dense) matching, depth camera and integrated laser- Point cloud data acquired by an indoor mobile measurement system of attitude sensors and cameras.
[0057] In the specific implementation process, the ground three-dimensional laser instrument can usually only scan part of the indoor area once (one station), such as a room, etc. During specific implementation, the three-dimensional model of each room can be calculated according to the method of the present invention, and then According to the layout of the interior space, th...
Embodiment 2
[0100] This embodiment provides a three-dimensional modeling device for indoor buildings based on point cloud data, please refer to figure 2 ,include:
[0101] The data acquisition module 201 is used to acquire the three-dimensional point cloud data of the indoor building;
[0102] A preprocessing module 202, configured to preprocess the three-dimensional point cloud data;
[0103] The clustering module 203 is used for performing plane clustering on the preprocessed three-dimensional point cloud data, extracting the points contained in the clustered plane, and constructing a plane slice equation according to the extracted points;
[0104] Neighborhood calculation module 204, used to calculate the neighborhood slice and geometric information of each plane slice;
[0105] The semantic classification module 205 is used to perform semantic classification on the plane slices according to the geometric information and the neighborhood relationship of the plane slices, and obtain ...
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Abstract
The invention provides an indoor building three-dimensional modeling method based on point cloud data. The method comprises the steps of firstly, obtaining and preprocessing the three-dimensional point cloud data; then carrying out the point cloud plane clustering to extract plane patches, calculating the neighborhoods of the plane patches according to a point set contained in the plane patches and used for plane semantic classification, merging processing, plane boundary capturing and topological information generation, and finally outputting a closed three-dimensional patch model which is composed of three-dimensional plane polygons and contains semantic and topological information of the indoor building. According to the invention, the problems such as the measurement errors existing inpoint cloud data, the density distribution unevenness, the data is incomplete due to indoor object shielding and the lack of semantic information, are overcome, a working process for automatically and quickly establishing the three-dimensional surface patch model of the indoor building by utilizing the three-dimensional point cloud is provided, the three-dimensional point cloud data of differentsources can be processed, a new method is provided for automatic and quick modeling of the indoor building, and a rich data basis is established for the indoor three-dimensional model in the fields ofmeasurement, building decoration, property management and the like.
Description
technical field [0001] The invention relates to the technical fields of three-dimensional laser scanning technology application and three-dimensional modeling, and in particular to a method and device for three-dimensional modeling of indoor buildings based on point cloud data. Background technique [0002] Although most of human activities are carried out indoors (inside buildings), the three-dimensional structure of indoor buildings has always been ignored due to the inertia of human thinking about the environment in which individuals live and the limitations of technical conditions. [0003] In the prior art, two-dimensional maps are usually used in indoor applications, such as fire maps in public buildings and conventional indoor navigation maps. In recent years, with the development of measurement and computer technologies, indoor 3D models or 3D maps are increasingly used in architectural decoration planning, indoor navigation, indoor facility management and maintenanc...
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