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Advanced iterative algorithm for phase extraction of randomly phase-shifted interferograms

机译:随机相移干涉图相位提取的高级迭代算法

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摘要

An advanced random phase-shifting algorithm to extract phase distributions from randomly phase-shifted interferograms is proposed. The algorithm is based on a least-squares iterative procedure, but it copes with the limitation of the existing iterative algorithms by separating a frame-to-frame iteration from a pixel-to-pixel iteration. The algorithm provides stable convergence and accurate phase extraction with as few as three interferograms, even when the phase shifts are completely random. The algorithm is simple, fast, and fully automatic. A computer simulation is conducted to prove the concept.
机译:提出了一种先进的随机相移算法,用于从随机相移的干涉图中提取相位分布。该算法基于最小二乘迭代过程,但是通过将帧间迭代与像素间迭代分离,可以解决现有迭代算法的局限性。即使相移是完全随机的,该算法也能以最少三个干涉图的形式提供稳定的收敛和准确的相位提取。该算法简单,快速且全自动。进行了计算机仿真以证明这一概念。

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