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http://dx.doi.org/10.3807/HKH.2007.18.2.122

Phase Unwrapping using Modified Goldstein Algorithm in Digital Holography  

Yoon, Seon-Kyu (Dept. of Physics, Cheju National University)
Cho, Hyung-Jun (Dept. of Physics, Cheju National University)
Kim, Doo-Cheol (Dept. of Physics, Cheju National University)
Yu, Young-Hun (Dept. of Physics, Cheju National University)
Kim, Sung-Kyu (Imaging Media Research Center, KIST)
Publication Information
Korean Journal of Optics and Photonics / v.18, no.2, 2007 , pp. 122-129 More about this Journal
Abstract
Generally, many kinds of phase unwrapping algorithm are used to obtain three-dimensional features in digital holography. The Goldstein algorithm is ra epresentative method. which requires small memory capacity and short execution time fer an unwrapping process. However, the Goldstein algorithm has some problems when the dipole residue is located at the boundary. When the opposite residues are located at the boundary and the distance between the opposite residues is longer than the boundary, an incorrect branch cut occurs and results in incorrect calculation. We have modified the Goldstein algorithm to solve the incorrect calculation problem using boundary information. We found that the modified Goldstein algorithm could resolve the Goldstein algorithm's problem.
Keywords
Phase unwrapping; Goldstein algorithm; Modified Goldstein algorithm;
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