Building facade measurement method and system based on 3D laser scanning

Abstract

The invention relates to a building facade measurement method and system based on three-dimensional laser scanning in the technical field of building measurement. The method part at least includes a data acquisition step, a point cloud data projection step, a point cloud data registration step, and a building facade gray scale The image generation step, the building elevation drawing step based on the gray image of the building; wherein for the facade containing at least two measuring station data, data registration processing is required; the system part includes a point cloud data registration module, an image generation module, Elevation drawing module. Overcoming the problems of complicated registration of point cloud data, serious loss of registration accuracy, serious data redundancy, and poor perception of 3D point clouds in the conventional building scanning operation method can effectively improve operation efficiency and measurement accuracy.

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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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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