Laser-point cloud data automatic registration method based on plane base images

A technology of laser point cloud data and plane reference, which is applied in image data processing, image analysis, instruments, etc., can solve problems such as limitations, difficulty in determining conversion parameters, and low reliability of conversion references, and achieve the effect of reducing time

Inactive Publication Date: 2013-09-11
BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE
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Problems solved by technology

However, the markers must be reasonably distributed, the scanner scans at a higher resolution, and in special cases, it is unrealistic to set the markers, which limits the application of automatic registration based on marker automatic recognition
Some researchers first extract features from laser point cloud data, match the extracted features, and calculate conversion parameters. The conversion references calculated by this method are not reliable. For example, for planes with the same name, the conversion parameters between them are relatively low. Difficult to determine

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  • Laser-point cloud data automatic registration method based on plane base images
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  • Laser-point cloud data automatic registration method based on plane base images

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Embodiment Construction

[0040] The present invention will be further described in detail below with reference to the accompanying drawings, so that those skilled in the art can implement it with reference to the text of the description.

[0041] Such as figure 1 As shown, the present invention provides an automatic registration method for laser point cloud data based on plane reference images, which includes the following steps:

[0042] Step 1: Use a laser scanner to scan the target building, and there is overlap in the scanning of the laser scanner at two adjacent sites, to obtain laser point cloud data of the target building at two adjacent sites respectively;

[0043] Step 2: Calculate the reference images of the laser point cloud data of two adjacent sites respectively, and the calculation process of the reference images of the laser point cloud data of each site is:

[0044] (1) Extract all the plane features of the laser point cloud data of a station, and use all the plane features to calculate all the...

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Abstract

The invention discloses a laser-point cloud data automatic registration method based on plane base images. According to the method, plane characteristics of two adjacent sites are respectively extracted, a datum plane is established based on the plane characteristics of each site, the base images are generated on the basis of the datum plane, homonymy point pairs of the base images of the two adjacent sites are determined by the matching of the base images of the two adjacent sites, and due to the fact the homonymy point pairs of the base images have three-dimensional coordinate information, spatial switching parameters of the two adjacent sites can be worked out through the homonymy point pairs. The laser-point cloud data automatic registration method does not need to be helped through scanning identification, is reliable and is favorable for reduction of spending on time, manpower and material resources, and non-professional users can obtain a high-quality three-dimensional data model.

Description

Technical field [0001] The invention relates to an automatic registration method of laser point cloud data, in particular to an automatic registration method of laser point cloud data based on a plane reference image. Background technique [0002] Although ground-based laser measurement technology has become a relatively mature and widely used technology, the automatic registration of multi-station laser point cloud data (referred to as "automatic registration") is still a hot research direction, which helps reduce time, The cost of manpower and material resources, and enables non-professional users to obtain high-quality three-dimensional data models. [0003] Regarding automatic registration, a variety of different methods have been proposed by the academic community. A typical method is to use artificial reflection marks such as spheres, cylinders, and planes as links between different scanning stations. The parameter conversion relationship between different measuring stations...

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Application Information

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IPC IPC(8): G06T7/00G06T7/33G06T7/37
Inventor 王晏民石宏斌
Owner BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE
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