Due to the physical nature of the interference phenomenon, extracting the phase of an interferogram is a known sinusoidal\nmodulation problem. In order to solve this problem, a new hybrid mathematical optimization model for phase extraction is\nestablished. The combination of frequency guide sequential demodulation and harmony search optimization algorithms is used\nfor demodulating closed fringes patterns in order to find the phase of interferogram applications.The proposed algorithm is tested\nin four sets of different synthetic interferograms, finding a range of average relative error in phase reconstructions of 0.14ââ?¬â??0.39 rad.\nFor reference, experimental results are compared with the genetic algorithm optimization technique, obtaining a reduction in\nthe error up to 0.1448 rad. Finally, the proposed algorithm is compared with a very known demodulation algorithm, using a real\ninterferogram, obtaining a relative error of 1.561 rad. Results are shown in patterns with complex fringes distribution
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