Unwrapping of electronic speckle pattern interferometry phase maps: evaluation of an iterative weighted algorithm

Guillermo H. Kaufmann; Gustavo E. Galizzi

doi:10.1117/1.601862

1 February 1998 Unwrapping of electronic speckle pattern interferometry phase maps: evaluation of an iterative weighted algorithm

Guillermo H. Kaufmann, Gustavo E. Galizzi

Author Affiliations +

Optical Engineering, Vol. 37, Issue 2, (February 1998). https://doi.org/10.1117/1.601862

Since current fringe analysis techniques used in electronic speckle pattern interferometry (ESPI) yield a phase map modulo 2t, phase unwrapping is the final step of any data evaluation process. In this paper the performance of a recently published unwrapping algorithm is investigated. The algorithm is based on a least-squares minimization technique solvable in an iterative manner by the discrete cosine transform. Phase inconsistencies are handled by excluding invalid pixels from the unwrapping process through the assignment of zero-valued weights. The study is carried out using computer simulated ESPI phase maps, an approach which allows us to generate noise-free phase fields that are used to calculate phase deviations as a function of the iteration number.

Citation Download Citation

Guillermo H. Kaufmann and Gustavo E. Galizzi "Unwrapping of electronic speckle pattern interferometry phase maps: evaluation of an iterative weighted algorithm," Optical Engineering 37(2), (1 February 1998). https://doi.org/10.1117/1.601862

Published: 1 February 1998

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