Three-dimensional laser scanning device system parameter calibration method

Abstract

The invention discloses a three-dimensional laser scanning device system parameter calibration method. Since laser scanning device system parameters have inherent mechanical installation and measurement errors during measuring, each parameter needs to be tuned slightly on the basis of the measured value. The invention discloses a reliable method for obtaining system parameter fine-tuning amount. The method is characterized by, to begin with, obtaining a point cloud model of a standard plane target through a three-dimensional laser scanning device; then, determining an evaluation index serving as a metric of precision of the point cloud model to enable the fine-tuning amount of the system parameters and the metric of precision of the point cloud model to be in a function relationship; and finally, searching a group of system parameter fine-tuning amount capable of enabling the point cloud model precision to be the highest, that is, precision metric value to get the optimum value, through a pattern search method, and thus the group of fine-tuning amount is the optimum system parameter fine-tuning amount. Result shows that after the system parameters are calibrated through the method above, the precision of point cloud data obtained by the scanning device in scanning a three-dimensional space scene is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of error calibration, and more particularly relates to a system parameter calibration method of a three-dimensional laser scanning device. Background technique [0002] With the rapid development of high-tech such as laser electronics technology and semiconductor technology, as well as the demand for 3D modeling in the real world in many application areas, 3D laser scanning technology plays an important role in many application fields. 3D laser scanning technology can quickly and accurately obtain the 3D coordinates of scene space points, and then completely reproduce the real physical world. 3D laser scanning has the characteristics of high precision, fast acquisition speed, intelligent scanning and massive measurement points. Although the three-dimensional laser scanning device is a very promising measurement equipment, the accuracy of the scanning device affects its wide application to a large extent. The...

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Problems solved by technology

[0006] The accuracy of the system parameters directly affects the accuracy of the three-dimensional point cloud data acquired by the scanning device. Due to the inherent mechanical errors and measurement errors in the manufacturing and installation of the scanning device, this directly leads to the inaccuracy of the system parameters. Among them, Measurement errors are intertwined with systematic errors and random errors, and the current general error correction methods cannot achieve better correction accuracy

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