Multi-floor indoor structured three-dimensional modeling method and system based on laser point cloud

Abstract

The invention discloses a multi-floor indoor structured three-dimensional modeling method and system based on laser point cloud, and the method comprises the steps of carrying out the segmentation ofa connection region between floors based on a point cloud elevation histogram in a vertical direction after inputting the multi-floor point cloud; carrying out single-floor room segmentation on each floor, carrying out single-floor indoor space unit division based on vector wall surface lines, and carrying out vector indoor plane graph construction based on vector and grid superposition; and according to Boolean intersection, deleting an overlapping surface between the floor and the communication area, and establishing a multi-floor three-dimensional model. According to the method, through thehistogram segmentation of a peak value-valley-peak value strategy, a multi-floor indoor structure reconstruction problem is converted into a single-floor indoor reconstruction problem and an inter-floor communication space reconstruction problem; through the means of first segmentation and then local reconstruction, the multi-floor building indoor three-dimensional model can be rapidly and efficiently constructed, the point cloud data in the indoor complex environment can be better processed, and the indoor structured modeling requirement is met.

Description

technical field [0001] The invention belongs to the technical field of map drawing, and in particular relates to a multi-floor indoor structured three-dimensional modeling method through point clouds. Background technique [0002] With the rapid development of economic activities, the number of buildings has increased significantly, and human indoor activities have increased significantly. At the same time, the internal structure of buildings is also showing a trend of large-scale and complex. Therefore, people's demand for understanding and cognition of the indoor environment has also been continuously improved, and indoor 3D modeling has aroused widespread attention. [0003] However, it is time-consuming and labor-intensive to directly model the indoor 3D scene through traditional measurement methods. 3D model construction based on laser point cloud has the advantages of fast speed and high precision, and has become a research hotspot in indoor 3D scene reconstruction. ...

AI Technical Summary

Problems solved by technology

However, there are still some problems in 3D modeling through indoor 3D point clouds, such as the large area of ​​wall data missing due to mutual occlusion of indoor facilities, the noise caused by strong reflective surfaces such as windows and glass in the room, and the division of indoor multi-floor spaces. The method is unstable, and problems such as indoor multi-floor model reconstruction

All of these have caused great difficulties for the automatic reconstruction of multi-floor indoor 3D models.

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