Stripe three-dimensional imaging calibration method and system

A technology of three-dimensional imaging and calibration method, which is applied to measurement devices, instruments, optical devices, etc., can solve the problems of low accuracy of calibration results and poor three-dimensional imaging effect, and achieve the effect of solving low accuracy and improving accuracy.

Pending Publication Date: 2021-05-28
CHENGDU TIEAN SCI & TECH
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides a fringe three-dimensional imaging calibration method and its system. By improving the fringe image acquisition method and image process

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Stripe three-dimensional imaging calibration method and system
  • Stripe three-dimensional imaging calibration method and system

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0016] In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] like figure 1 As shown, a fringe three-dimensional imaging calibration method includes:

[0018] S1: Calculate the internal parameters of the camera unit.

[0019] Further, the S1 includes: collecting a plurality of checkerboard images based on a camera unit, and calculating the internal parameters of the camera unit based on the plurality of checkerboard images. Alternatively, a plurality of circular calibration plate images are collected based on a camera unit, and the internal parameters of the camera unit are calculated based on the plurality of circular calibration plate images.

[0020] S2: Collect multiple fringe image data projected by the imaging unit in the depth of field interval.

[0021] Further, the step ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a stripe three-dimensional imaging calibration method and system. The method comprises the following steps: calculating an internal reference of a camera unit; acquiring a plurality of stripe image data projected by the imaging unit in the depth-of-field interval; calculating a phase value corresponding to each fringe image data, and generating a height-phase mapping relation function based on the height value corresponding to each fringe image; and based on the internal reference and the height-phase mapping relation function of the camera unit, generating a coordinate transformation matrix used for representing a mapping relation between fringe information and spatial information. Through cooperation of the camera unit, the high-precision electric displacement platform unit and the data processing unit, stripe image data and height information corresponding to the stripe image data are automatically collected, and a coordinate transformation matrix used for representing a mapping relation between stripe information and spatial information is generated. Calibration errors are not introduced while automatic stripe three-dimensional imaging calibration is achieved, and the accuracy of calibration results is effectively improved.

Description

technical field [0001] The invention relates to the technical field of image detection, in particular to a stripe three-dimensional imaging calibration method and a system thereof. Background technique [0002] In the traditional 3D imaging technology, the 3D imaging method based on stripe structured light is one of the mainstream 3D imaging methods. The fringe 3D imaging framework mainly includes system calibration, phase encoding, and phase calculation. Its core principle is: by projecting a single-frequency (or a series of multi-frequency) fringe images to the target object, the height change of the surface of the object to be measured will cause the fringes to show different degrees of deformation, bending or truncation. By collecting these modulated fringe images, and through a series of dephasing algorithms combined with calibration parameters, the three-dimensional profile of the surface of the object to be measured can be calculated. [0003] However, in the tradit...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01B11/25
CPCG01B11/2504G01B11/254
Inventor 张渝赵波彭建平王祯黄炜马莉胡继东王小伟章祥牟科瀚
Owner CHENGDU TIEAN SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap