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External building wall measurement method and system based on three-dimensional laser scanning

A technology of three-dimensional laser and measurement method, which is applied in the field of building measurement, can solve problems such as poor perception of three-dimensional point cloud, complicated registration of point cloud data, loss of registration accuracy, etc., achieve simple registration of scanned data, improve field Operational efficiency and the effect of reducing data dimensions

Active Publication Date: 2020-01-14
SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
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Problems solved by technology

[0003] The purpose of the present invention is to provide a building facade measurement method and system based on three-dimensional laser scanning, which overcomes the complicated point cloud data registration, serious loss of registration accuracy, serious data redundancy, and three-dimensional point cloud existing in conventional building scanning operation methods. Problems such as poor cloud perception effect can effectively improve work efficiency and measurement accuracy

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  • External building wall measurement method and system based on three-dimensional laser scanning
  • External building wall measurement method and system based on three-dimensional laser scanning
  • External building wall measurement method and system based on three-dimensional laser scanning

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Embodiment Construction

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] This embodiment develops a building facade measurement system based on three-dimensional laser scanning, including:

[0035] The point cloud data registration module is used to perform registration processing on the point cloud data;

[0036] The image generation module is used to convert the point cloud data after projection registration into a picture, and convert the 3D vector data into 2D raster data to form a gray scale image of the building;

[0037] The elevation drawing module is used to draw building elevations with the building grayscale image as a reference base map, and output the processed drawings in a common file format;

[0038] Wherein, the above-mentioned point cloud data registration module includes at least a data format conversion functional unit, a point cloud loading and displaying functional unit, a point cloud c...

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Abstract

The invention relates to an external building wall measurement method and system based on three-dimensional laser scanning in the technical field of building measurement. The method at least comprisesa data acquisition step, a point cloud data projection step, a point cloud data registration step, a building facade gray scale image generation step and a building facade graph drawing step based ona building gray scale image. Data registration processing needs to be carried out on the facades at least containing data of two observation stations. In addition, the system comprises a point clouddata registration module, an image generation module and a facade graph drawing module. Therefore, problems of complicated point cloud data registration, serious registration precision loss, serious data redundancy, poor three-dimensional point cloud impression effect and the like in the conventional building scanning operation method are solved; and the operation efficiency and the measurement precision can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of building measurement, in particular to a measurement method for drawing a horizontal and vertical section of a building by using three-dimensional laser scanning. Background technique [0002] At present, the facades of buildings are mainly measured and drawn by traditional measuring instruments such as tape measure, camera, and total station. The traditional method has problems such as low efficiency in field operations and difficulty in forming maps in the field. Three-dimensional laser scanning technology is a new type of measurement technology developed in recent years. It can accurately and efficiently obtain the three-dimensional coordinates and image data of the measurement target in the whole field of view. It has high measurement efficiency (1 million points / second), rich measurement information ( Coordinates + laser reflectivity), high measurement accuracy (mm level) and other advantages. This...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C11/04
CPCG01C11/04
Inventor 郭春生王令文谢海燕张方曹平宫玮清
Owner SHANGHAI GEOTECHN INVESTIGATIONS & DESIGN INST
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