Three-dimensional reconstruction technique based on triangular phase shift and complementary gray code

Ruixue Gao; Pengchang Zhang; Pengchong Wang; Xi Ling

doi:10.1117/12.2606547

24 November 2021 Three-dimensional reconstruction technique based on triangular phase shift and complementary gray code

Ruixue Gao, Pengchang Zhang, Pengchong Wang, Xi Ling

Proceedings Volume 12065, AOPC 2021: Optical Sensing and Imaging Technology; 120652E (2021) https://doi.org/10.1117/12.2606547
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

Structured light 3D reconstruction technology has the advantages of non-contact, low cost and high reliability, and is widely used in industrial parts defect detection, cultural relics 3D digitization and other fields. As the core part of structured light, coding method is the key element to obtain 3D scene information, which directly affects the accuracy of 3D reconstruction. The combination of gray coding and phase shifting is a typical method for 3D shape measurement. However, due to the complexity of sinusoidal fringe calculation, and the fringe pattern boundary cannot be strictly aligned, there is a step change problem, which limits the application of this method in the field of real-time high-speed three-dimensional measurement. In this paper, the phase shift method of triangular wave and gray coding are combined to measure the 3D morphology. The triangular wave function only uses two raster images and the phase information can be obtained by simple intensity ratio calculation. The binary defocus technique can shorten the projection time, but it blurs the edge boundary of gray code and aggravates the step problem of reconstruction of object surface. In order to solve this problem, the complementary gray code whose fringe width is half of the sinusoidal fringe period is used to correct the period deviation. The experimental results show that the proposed method can reduce the number of fringe projection, simplify the calculation steps and shorten the time of data processing, so it is feasible.

Citation Download Citation

Ruixue Gao, Pengchang Zhang, Pengchong Wang, and Xi Ling "Three-dimensional reconstruction technique based on triangular phase shift and complementary gray code", Proc. SPIE 12065, AOPC 2021: Optical Sensing and Imaging Technology, 120652E (24 November 2021); https://doi.org/10.1117/12.2606547

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Phase shifts

3D metrology

3D modeling

Structured light

Binary data

Cameras

Raster graphics

Keywords/Phrases

Search In:

Publication Years