Phase unwrapping by a noise immune algorithm: fringe estimation, quality segmentation, and sorted extraction

Sheng Liu; Lian X. Yang

doi:10.1117/12.679260

14 August 2006 Phase unwrapping by a noise immune algorithm: fringe estimation, quality segmentation, and sorted extraction

Sheng Liu, Lian X. Yang

Author Affiliations +

Proceedings Volume 6292, Interferometry XIII: Techniques and Analysis; 62920C (2006) https://doi.org/10.1117/12.679260
Event: SPIE Optics + Photonics, 2006, San Diego, California, United States

Abstract

In optical measurement techniques, such as holographic interferometry, shearographic interferometry, and 3D-computer vision, phase is used as a carrier for different physical properties. For example, phase could stand for the information of shape, deformation, or strain. The useful information is coded and wrapped into -π to +π range in phase map. Phase unwrapping is the basic technique to resolve 2π ambiguities and recover physical properties. In this paper, we describe a novel method for unwrapping phase in a noise-disturbed phase map, which is characterized with broken fringes. In this method, phase map is well analyzed before phase unwrapping. Broken fringes are detected and fixed. Phase map is segmented into different regions based on phase quality. Those regions with good phase quality will be unwrapped first and errors introduced by noise will be minimized. Several applications will be presented to testify our new method.

Citation Download Citation

Sheng Liu and Lian X. Yang "Phase unwrapping by a noise immune algorithm: fringe estimation, quality segmentation, and sorted extraction", Proc. SPIE 6292, Interferometry XIII: Techniques and Analysis, 62920C (14 August 2006); https://doi.org/10.1117/12.679260

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