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Three-dimensional scanning method containing multiple lasers with different wavelengths and scanner

A technology of three-dimensional scanning and laser, applied in the field of three-dimensional scanning, can solve the problems of single wavelength, high cost, poor applicability, etc., and achieve the effect of increasing reusability and improving cost performance

Active Publication Date: 2017-03-15
SCANTECH (HANGZHOU) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies of the existing handheld laser three-dimensional scanners that only contain a single wavelength, poor applicability, and high cost, the present invention provides a multiplex scanner with multiple different wavelengths, good applicability, and increased single scanner A three-dimensional scanning method and scanner with multiple lasers of different wavelengths that are more efficient and cost-effective

Method used

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  • Three-dimensional scanning method containing multiple lasers with different wavelengths and scanner
  • Three-dimensional scanning method containing multiple lasers with different wavelengths and scanner
  • Three-dimensional scanning method containing multiple lasers with different wavelengths and scanner

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Embodiment 1

[0028] refer to Figure 1 ~ Figure 3 , a three-dimensional scanning method containing a plurality of lasers with different wavelengths, the scanner for realizing the three-dimensional scanning method includes a fixed camera and at least two laser projectors, and the at least two laser projectors correspond to at least two For different wavelengths, the spatial position of the light curtain projected by the laser projector and the positional relationship of the camera are all calibrated and known; the three-dimensional scanning method is as follows:

[0029] According to the 2D pattern recognition of the laser contour projected on the surface of the scanned object captured by the camera, the 2D line of the highlight center is obtained, and then the spatial 3D point cloud data is calculated according to the principle of triangulation.

[0030] Further, an additional camera with a known positional relationship is used to form a binocular stereo camera with the original camera to ...

Embodiment 2

[0045] refer to Figure 1 ~ Figure 3 , a three-dimensional scanner containing a plurality of lasers with different wavelengths, the scanner includes at least two laser projectors, at least one camera for shooting laser patterns projected onto the surface of an object to be detected, and a camera connected to image recognition and three-dimensional A reconstructed calculation processing unit; the at least two laser projectors correspond to at least two different wavelengths, the spatial position of the light curtain projected by the laser projectors and the positional relationship of the camera are all calibrated and known, and the output end of the camera is connected to the The calculation and processing unit is connected, and the calculation and processing unit includes a 2D image laser contour extractor, a 3D constructor, a first band switching judge for selecting the internal reference and distortion coefficient of the calibration camera at a selected wavelength and for Se...

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Abstract

The invention relates to a three-dimensional scanning method containing multiple lasers with different wavelengths. A scanner for implementing the three-dimensional scanning method comprises a camera and at least two laser projectors with the position being fixed, wherein the at least two laser projectors correspond to at least two different wavelengths, and positional relations between spatial positions of light curtains projected by the laser projectors and the camera are calibrated to be known. The three dimensional scanning method comprises the steps of recognizing and acquiring a highlight center two-dimensional line according to a 2D pattern, which is shot by the camera, of a laser contour line projected to the surface of a scanned object, and then calculating according to a triangle method principle to acquire spatial three-dimensional point cloud data. The invention provides a scanner for implementing the three-dimensional scanning method containing multiple lasers with different wavelengths. The three-dimensional scanning method containing multiple lasers with different wavelengths and the scanner have multiple different wavelengths, are good in applicability, increase the reusability of the single scanner, and improve the cost performance ratio.

Description

technical field [0001] The invention relates to a three-dimensional scanning technology, in particular to a three-dimensional scanning method and a scanner. Background technique [0002] The principle of three-dimensional measuring instruments such as handheld laser three-dimensional scanners and laser three-dimensional profile sensors that have appeared in recent years is to use the combination of laser and camera to obtain three-dimensional data on the surface of objects according to the triangulation method. This measurement principle is more and more widely used. It has become one of the main measurement methods in the field of high-precision three-dimensional measurement, and is widely used in machinery, automobiles, aviation, sculpture, medical and other industries. [0003] In this three-dimensional measurement method based on laser and camera, the common laser bands include 405nm purple laser, 450nm blue laser, 532nm green laser, 650nm red laser, etc. The influence o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B11/25
CPCG01B11/2513
Inventor 郑俊陈尚俭
Owner SCANTECH (HANGZHOU) CO LTD
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