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Building facade three-dimensional reconstruction method based on knapsack type three-dimensional laser point cloud data

A point cloud data and 3D laser technology, applied in the field of geographic information, can solve the problems of incomplete point cloud data, large amount of point cloud data of 3D objects, and insufficient details of building reconstruction, etc., to achieve flexible operation methods, low cost, and work efficiency high effect

Active Publication Date: 2020-01-21
SUZHOU IND PARK SURVEYING MAPPING & GEOINFORMATION CO LTD
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AI Technical Summary

Problems solved by technology

This invention solves the problem in the prior art that the details of architectural reconstruction are insufficient due to the large amount of point cloud data of 3D objects and incomplete point cloud data.

Method used

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  • Building facade three-dimensional reconstruction method based on knapsack type three-dimensional laser point cloud data
  • Building facade three-dimensional reconstruction method based on knapsack type three-dimensional laser point cloud data
  • Building facade three-dimensional reconstruction method based on knapsack type three-dimensional laser point cloud data

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Embodiment

[0047] Such as Figure 1-7 Shown is a 3D reconstruction method for building facades based on backpack 3D laser point cloud data, including the following steps:

[0048] S1. Acquisition of building point cloud data: Obtain building point cloud data through a backpack-type 3D laser scanning system. The point cloud data obtained during the operation of backpack-type 3D laser equipment is not only buildings, but also roads, trees and other targets. In this embodiment, a certain industrial factory area is taken as the research object, and the Leica Pegasus mobile reality measurement backpack is used to collect data on the factory area, obtain point cloud data and photos of the target building, and then use the hardware supporting IE software to perform GNSS format conversion and trajectory calculation And pre-check, and then use the supporting Infinity software to establish a coordinate system, and finally use the supporting AutoP software to perform SLAM calculation (modify the tr...

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Abstract

The invention discloses a building facade three-dimensional reconstruction method based on knapsack type three-dimensional laser point cloud data, and relates to the technical field of geographic information. The method comprises the following steps: S1, acquiring building point cloud data; S2, automatically extracting building facade point cloud data; S3, automatically segmenting the single buildings; S4, acquiring a geometric position boundary of the building facade; and S5, building facade three-dimensional reconstruction. A point cloud filtering algorithm based on voxel projection densityis adopted to effectively filter non-building targets such as the ground and vegetation while a relatively complete building target is reserved, and then automatic segmentation of a single building isrealized by utilizing an image global search and profile analysis method. An RANSAC algorithm is used to carry out facade automatic segmentation and redundant facade elimination on the single building point cloud to obtain a building facade geometric position boundary; and the two-dimensional boundary line is used to constrain the original point cloud data and an RANSAC algorithm is combined tocarry out facade three-dimensional boundary straight line fitting so as to obtain a building facade geometric frame model.

Description

technical field [0001] The invention relates to the technical field of geographic information, in particular to a method for three-dimensional reconstruction of building facades based on backpack-type three-dimensional laser point cloud data. Background technique [0002] With the gradual deepening of concepts such as "smart city", urban spatial information has become an indispensable and important resource in today's society. Buildings are the most important part of the city. The method of realizing automatic 3D reconstruction of building facades based on remote sensing data will provide important basic data for "digital cities", and it is also one of the difficulties in the current research field. [0003] The current modeling software regards the building as a rigid body structure. By measuring the geometric parameters of the building components in the point cloud data, similar geometric primitives are generated to piece together the model of the building. The model gene...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/10G06T7/11
CPCG06T17/10G06T7/11G06T2210/04G06T2207/10028G06T2200/08
Inventor 邢万里蔡东健周旺辉岳顺
Owner SUZHOU IND PARK SURVEYING MAPPING & GEOINFORMATION CO LTD
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