13 October 1999 Intelligent regional phase unwrapping by an integrated expert system
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A refinement of a regional phase unwrapping technique that is driven by an integrated expert system is described. The traditional phase unwrapping algorithms used for phase shifting and Fourier transform is very noise-dependent and frequently unsatisfactory for heavily noise-ridden interferograms. THose methods that try to get rid of noises are too passive and limited. The developed method actively eliminates noises by using algorithmic as well as knowledge- based, intelligent approaches in constructing sound, not- distorted 2(pi) jump lines that divide an entire image into regions. Then regional phase unwrapping is performed region by region by adding or subtracting adequate 2(pi) multiples. The integrated expert system can correct noisy data on the iso-phase lines and the regional phase unwrapping algorithm isolates noises inside the regions without propagation.
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Wonjong Joo, Wonjong Joo, Soyoung Stephen Cha, Soyoung Stephen Cha, } "Intelligent regional phase unwrapping by an integrated expert system", Proc. SPIE 3783, Optical Diagnostics for Fluids/Heat/Combustion and Photomechanics for Solids, (13 October 1999); doi: 10.1117/12.365750; https://doi.org/10.1117/12.365750

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