Three-dimensional scanning method of laser comprising multiple different wavelengths, and scanner

A three-dimensional scanning and laser technology, 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 scann

Method used

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  • Three-dimensional scanning method of laser comprising multiple different wavelengths, and scanner
  • Three-dimensional scanning method of laser comprising multiple different wavelengths, and scanner
  • Three-dimensional scanning method of laser comprising multiple different wavelengths, and scanner

Examples

Experimental program
Comparison scheme
Effect test

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 at least two fixed cameras and at least two laser projectors, and the at least two laser projectors correspond to at least Two different wavelengths, the spatial positional relationship calibration of the two cameras is known; the three-dimensional scanning method is as follows:

[0029] According to the 2D patterns of the laser contour lines projected onto the surface of the scanned object captured by the two cameras, the two-dimensional lines of the highlight center are respectively recognized and obtained, and then the spatial three-dimensional point cloud data is obtained according to the principle of triangulation and epipolar constraints.

[0030] Further, the two cameras capture the laser profile features on the surface of the scanned object while identifying the i...

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 two cameras for shooting laser patterns projected onto the surface of an object to be detected, and a connected camera for image recognition and A calculation and processing unit for three-dimensional reconstruction; the at least two laser projectors correspond to at least two different wavelengths, the positions of the at least two laser projectors are fixed, the spatial position relationship calibration of the two cameras is known, and the at least two The output ends of the cameras are connected to the calculation processing unit, and the calculation processing unit includes a 2D image laser contour extractor, a 3D constructor and an internal reference and a distortion coefficient for selecting and calibrating at least two cameras at a selected wavelength A band switching judger, the outp...

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PUM

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Abstract

The invention discloses a three-dimensional scanning method of a laser comprising multiple different wavelengths. A scanner for realizing the three-dimensional scanning method comprises at least two pick-up heads at fixed positions and at least two laser projectors, wherein the at least two laser projectors are corresponding to at least two different wavelengths, and the space position relation of the two pick-up heads is calibrated as known. The three-dimensional scanning method comprises the following steps: according to 2D patterns of laser contour lines, which are shot by the two pick-up heads and are projected to the surface of a scanned object, respectively identifying and obtaining highlight center two-dimensional lines, and then according to a triangle method principle and a polar constrain principle, obtaining space three-dimensional point cloud data. Further provided is a scanner for realizing the three-dimensional scanning method of the laser comprising the multiple different wavelengths. The method and scanner have the advantages of multiple different wavelengths, good applicability, enhanced reusability of a single scanner and improved cost performance.

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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IPC IPC(8): G01B11/25
CPCG01B11/254G01B21/045G06T7/521G06T7/593G06T7/85H04N2013/0081H04N13/239H04N13/246H04N13/254H04N13/257H04N13/296
Inventor 郑俊陈尚俭
Owner SCANTECH (HANGZHOU) CO LTD
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