Surface structured light three-dimensional measurement method and system based on phase weighted fusion

A phase weighting and three-dimensional measurement technology, applied in the field of three-dimensional measurement, can solve the problems of low calculation accuracy of phase map and uneven reconstruction of point cloud

Active Publication Date: 2021-09-07
HUAZHONG UNIV OF SCI & TECH
View PDF6 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above defects or improvement needs of the prior art, the present invention provides a three-dimensional measurement method and system of surface structured light based on phase weighted fu

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
  • Surface structured light three-dimensional measurement method and system based on phase weighted fusion
  • Surface structured light three-dimensional measurement method and system based on phase weighted fusion
  • Surface structured light three-dimensional measurement method and system based on phase weighted fusion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0047] An embodiment of the present invention provides a three-dimensional measurement method of surface structured light based on phase weighted fusion, such as Figure 1-2 shown, including:

[0048] S1, project a group of multi-frequency grating fringe images to the surface of the workpiece to be measured, and acquire the fringe projection images formed on the surface of the workpiece to be m...

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 surface structured light three-dimensional measurement method and system based on phase weighted fusion, and the method comprises the steps: constructing a phase weighted fusion model based on different phase images obtained under multiple exposure times, calculating an accurate phase value based on the phase value under multiple exposure times, and obtaining a uniform phase distribution diagram through combining the neighborhood phase distribution. Compared with a traditional method of carrying out pixel-level replacement on a grey-scale image to realize high dynamic range image synthesis, the method has the advantages that error influence caused by factors such as camera noise and local reflection can be reduced, a more accurate phase image can be acquired, accurate matching of phase points of a left camera and a right camera is realized, and accuracy and smoothness of reconstructed point cloud are guaranteed.

Description

technical field [0001] The invention belongs to the field of three-dimensional measurement, and more specifically relates to a method and system for three-dimensional measurement of surface structured light based on phase weighted fusion. Background technique [0002] At present, in the field of industrial parts measurement, the three-dimensional measurement technology based on surface structured light has the advantages of fast measurement speed and large amount of data, and has been widely used. However, industrial metal parts often have multi-reflection areas such as rust, oil stains, and processed reflective surfaces on the surface, resulting in weak reflection, strong reflection, multiple reflection, scattering, etc., resulting in low signal-to-noise ratio and saturation distortion in the image. phenomenon, resulting in large phase calculation errors and three-dimensional calculation errors. [0003] Aiming at this problem, the existing solutions are mainly divided int...

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): G01B11/25G06T17/20
CPCG01B11/254G06T17/20
Inventor 李中伟张攀钟凯王从军史玉升
Owner HUAZHONG UNIV OF 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