A novel absolute phase retrieval method requiring only three projected patterns

Lin Fan; Shaohui Zhang; Yao Hu; Qun Hao

doi:10.1117/12.2573919

10 October 2020 A novel absolute phase retrieval method requiring only three projected patterns

Lin Fan, Shaohui Zhang, Yao Hu, Qun Hao

Proceedings Volume 11552, Optical Metrology and Inspection for Industrial Applications VII; 115521H (2020) https://doi.org/10.1117/12.2573919
Event: SPIE/COS Photonics Asia, 2020, Online Only

Conference Poster

Abstract

In fringe projection profilometry, phase unwrapping has long been a critical issue. Unwrapping methods can be classified as spatial unwrapping methods and temporal unwrapping methods. The spatial unwrapping method applies only to the surface of continuous objects. The temporal unwrapping method is more widely used and can be used on discontinuous or isolated objects. Nevertheless, the temporal unwrapping methods are suffering from time-consuming, such as the large number of pictures required (standard temporal unwrapping method, phase shift plus Gray code method), and high algorithm complexity (such as periodic encoding method, Fourier transform Method) Etc. Therefore, we propose a temporal unwrapping method using only three projection patterns. In this method, two linear gray scale increasing and decreasing pictures are used to obtain the cores global phase map and uniform illumination background. Another sine fringe image and the above uniformly illuminated background image are used to obtain the wrapped phase. Then the absolute phase can be achieved with the coarse global phase distribution and the wrapped phase. Experimental results prove that this method can measure three-dimensional scenes containing isolated objects.

Citation Download Citation

Lin Fan, Shaohui Zhang, Yao Hu, and Qun Hao "A novel absolute phase retrieval method requiring only three projected patterns", Proc. SPIE 11552, Optical Metrology and Inspection for Industrial Applications VII, 115521H (10 October 2020); https://doi.org/10.1117/12.2573919

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