Multifilter phase imaging with partially coherent light (MFPI-PC) and phase optical transfer function recovery (POTFR) are two viable defocus-based, two-dimensional quantitative phase imaging (QPI) methods. While both methods use transfer function inversion, MFPI-PC is based on the in-focus intensity derivative, while POTFR is based on the intensity difference between symmetrically defocused images. This paper compares and contrasts MFPI-PC and POTFR. Six disadvantages (five in MFPI-PC and one in POTFR) are identified. Improvement strategies to overcome each of the six shortcomings are identified and implemented, and both methods are shown to be clearly improved. The revised MFPI-PC is shown to be more accurate than the original MFPI-PC and generally more accurate than the revised POTFR. The revised POTFR is shown to be inherently faster than the original POTFR and also slightly faster than the revised MFPI-PC.

中文翻译：

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两种改进的散焦定量相成像方法：讨论。

具有部分相干光的多滤镜相位成像（MFPI-PC）和相位光学传递函数恢复（POTFR）是两种可行的基于散焦的二维定量相位成像（QPI）方法。虽然这两种方法都使用传递函数求逆，但MFPI-PC是基于对焦强度的导数，而POTFR是基于对称散焦图像之间的强度差。本文比较并对比了MFPI-PC和POTFR。确定了六个缺点（在MFPI-PC中五个缺点，在POTFR中一个缺点）。确定并实施了克服六个缺点中的每一个的改进策略，并且两种方法都显示出明显的改进。修订版MFPI-PC被证明比原始MFPI-PC更准确，并且通常比修订版POTFR更准确。