Vandenhouten R, Grebe R
Appl Opt. 1995 Mar 10;34(8):1401-6. doi: 10.1364/AO.34.001401.
A method for automated phase reconstruction from holographic interferograms of nonideal phase objects based on a two-dimensional Fourier transform is described. In particular, the problem of phase unwrapping is solved because earlier techniques are inappropriate for the phase unwrapping from interferograms of partially absorbent objects. A noise-level-dependent criterion for the binary mask that defines the unwrapping path for the flood algorithm is derived. The method shows high noise immunity, and the result is reliable provided that the true phase is free of discontinuities. The phase distribution in the outmasked regions is estimated by a linear least-squares fit to the surrounding unwrapped pixels.
描述了一种基于二维傅里叶变换从非理想相位物体的全息干涉图进行自动相位重建的方法。特别地，解决了相位展开问题，因为早期技术不适用于从部分吸收物体的干涉图进行相位展开。推导了用于定义洪水算法展开路径的二元掩模的噪声水平相关准则。该方法具有高抗噪声能力，并且只要真实相位没有间断，结果就是可靠的。通过对周围展开像素进行线性最小二乘拟合来估计掩模区域外的相位分布。
