Real-time three-dimensional shape measurement based on color binary fringe projection

Guangkai Fu; Yiping Cao; Yapin Wang; Yingying Wan; Lu Wang; Chengmeng Li

doi:10.1117/1.OE.58.4.044102

15 April 2019 Real-time three-dimensional shape measurement based on color binary fringe projection

Guangkai Fu, Yiping Cao, Yapin Wang, Yingying Wan, Lu Wang, Chengmeng Li

Author Affiliations +

Optical Engineering, Vol. 58, Issue 4, 044102 (April 2019). https://doi.org/10.1117/1.OE.58.4.044102

Abstract

A real-time three-dimensional (3-D) shape measurement based on single-shot color binary fringe (CBF) projection is proposed. In the traditional 3-D shape measurement methods based on binary fringe projection, the duty cycle of the binary fringe is always set to 1/2, so as to approximate the sinusoidal fringe by defocusing projection. In the proposed method, the binary fringe with a duty cycle of 1/3 is introduced. It is found that although the duty cycle is not 1/2, a nearly unbroken sinusoidal fringe pattern can be extracted from the captured fringe pattern by a filtering operation in the spatial frequency domain. In order to realize real-time 3-D shape measurement, a composite CBF was designed, in which three monochromatic binary fringes share the same duty cycle of 1/3 but misaligned 1/3 periods one by one are encoded in red (R), green (G), and blue (B) channels. When this composite CBF is projected onto the measured object, only one color-deformed pattern (CDP) needs to be captured and three monochromatic sinusoidal deformed patterns with a phase-shifting of 2π / 3 one another can be extracted from the single-shot captured CDP. So the 3-D shape of the measured object can be reconstructed with three-step phase measuring profilometry. The experimental results show the feasibility and validity of the proposed method. It can either effectively avoid the color overlapping in traditional color sinusoidal fringe or avoid the grayscale nonlinearity of sinusoidal fringe caused by the effect of gamma.

Citation Download Citation

Guangkai Fu, Yiping Cao, Yapin Wang, Yingying Wan, Lu Wang, and Chengmeng Li "Real-time three-dimensional shape measurement based on color binary fringe projection," Optical Engineering 58(4), 044102 (15 April 2019). https://doi.org/10.1117/1.OE.58.4.044102

Received: 11 December 2018; Accepted: 2 April 2019; Published: 15 April 2019

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