Method for acquiring and resolving laser scanning data reflected by any curved mirror

A technology of data acquisition and laser scanning, which is applied in the field of surveying and mapping, can solve problems such as blind spots, non-direct sight areas, occluded scanning, voids, etc., and achieve universal effects

Active Publication Date: 2020-04-03
WUHAN UNIV
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Problems solved by technology

[0003] The embodiment of the present application provides a method for obtaining and calculating laser scanning data reflected by an arbitrary curved surface mirror, which solves the problem of limited wo

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  • Method for acquiring and resolving laser scanning data reflected by any curved mirror
  • Method for acquiring and resolving laser scanning data reflected by any curved mirror
  • Method for acquiring and resolving laser scanning data reflected by any curved mirror

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Embodiment Construction

[0048] In order to better understand the above-mentioned technical solution, the above-mentioned technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0049] This embodiment provides the acquisition and calculation method of laser scanning data reflected by any curved surface mirror, see Figure 1-Figure 2 , including the following steps:

[0050] S1. Curved mirror fitting, pre-scanning the curved mirror, obtaining point cloud data of the curved mirror, and then fitting the curved mirror.

[0051] Specifically, since the point cloud data of the complete curved mirror cannot be obtained during the actual scanning process, it is necessary to pre-process the curved mirror and cover the surface with powder to make it less prone to reflection to obtain a complete curved mirror The point cloud data, and then fit the surface mirror. That is, in the process of fitting the parameters of the curved mir...

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Abstract

The invention belongs to the technical field of surveying and mapping, and discloses a method for acquiring and resolving laser scanning data reflected by any curved mirror, which comprises the following steps of: pre-scanning the curved mirror, fitting the curved mirror, and resolving a pre-positioned rotation matrix; then, placing the curved mirror at a dead angle of a working space, scanning anobject through a three-dimensional laser scanner, separating obtained laser point cloud scanning data to acquire positioned point cloud coordinates and calculate a positioned rotation matrix and carrying out space coordinate conversion, converting the positioned point cloud coordinates into pre-positioned space coordinates, calculating object point cloud coordinates on the object corresponding to the laser image points in the laser point cloud reflected by the curved mirror, and carrying out registration synthesis to obtain complete point cloud of the object. According to the invention, theproblems of point cloud data loss and holes in the non-direct-view area of the scanned object in the prior art are solved, and the complete point cloud of the object can be obtained.

Description

technical field [0001] The invention relates to the technical field of surveying and mapping, in particular to a laser scanning data acquisition and calculation method reflected by an arbitrary curved surface mirror. Background technique [0002] Due to the country's emphasis on the protection of cultural heritage, more and more high-tech has been invested in it, including the use of laser scanning technology for 3D reconstruction. Laser scanning technology is an important means of high-precision 3D reconstruction. It can obtain dense point clouds on the surface of objects with an accuracy better than 2mm. It is widely used in precision measurement, virtual geographic environment, cultural relics protection, and virtual reality. The integrity of the scanned object is the basic requirement for high-precision 3D reconstruction. In order to ensure that the object data is as complete as possible, the current common methods are: multi-station scanning and joint scanning of multip...

Claims

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Application Information

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IPC IPC(8): G01B11/24
CPCG01B11/24
Inventor 王景荣张帆黄先锋
Owner WUHAN UNIV
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