Title

Robust Phase-unwrapping Algorithm Using a Spatial Binary-tree Image Decomposition

Document Type

Article

Publication Date

7-1998

Publication Source

Applied Optics

Abstract

The search for fast and robust phase-unwrapping algorithms remains an important problem in the development of real-time interferometric systems. Our phase-unwrapping approach uses a spatial binary-tree image decomposition to permit maximum parallelism in implementation. At each node in the tree structure, a single unwrapping decision is made between two image blocks. The unwrapping rule is derived from a statistical-estimation framework. Specifically, a maximum-likelihood estimate of the demodulation term is used. This term can be viewed as that which minimizes a discontinuity-penalizing cost function. We show that the algorithm exhibits a high level of robustness. Quantitative measures of performance are provided, and many phase maps are shown for subjective evaluation.

Inclusive pages

4468-4476

ISBN/ISSN

1559-128X

Publisher

OSA: The Optical Society

Volume

37

Issue

20

Peer Reviewed

yes