用于叠层成像的即插即用半二次分裂方法
Plug-and-Play Half-Quadratic Splitting for Ptychography
AI总结：
本文提出一种半二次分裂框架，将即插即用及其他数据驱动先验引入叠层成像相位恢复，并通过自然图像与真实对象验证其重建效果。
摘要：
叠层成像是一种相干衍射成像方法，它利用相位恢复技术重建复值图像。其实现方式是用相干光束依次照射样品的重叠区域，并记录衍射图样。尽管该方法解决了传统成像系统面临的挑战，但计算量很大，且对噪声高度敏感，尤其是在照明重叠程度降低时。数据驱动的正则化技术已被应用于相位恢复，以提升重建质量。特别是即插即用（PnP）方法通过将数据驱动去噪器作为隐式先验加以集成，从而提供了灵活性。在本研究中，我们提出了一种半二次分裂框架，用于在叠层成像中使用 PnP 和其他数据驱动先验。我们在自然图像和真实测试对象上对所提方法进行了评估，以验证其在叠层成像图像重建中的有效性。
英文摘要：
Ptychography is a coherent diffraction imaging method that uses phase retrieval techniques to reconstruct complex-valued images. It achieves this by sequentially illuminating overlapping regions of a sample with a coherent beam and recording the diffraction pattern. Although this addresses traditional imaging system challenges, it is computationally intensive and highly sensitive to noise, especially with reduced illumination overlap. Data-driven regularisation techniques have been applied in phase retrieval to improve reconstruction quality. In particular, plug-and-play (PnP) offers flexibility by integrating data-driven denoisers as implicit priors. In this work, we propose a half-quadratic splitting framework for using PnP and other data-driven priors for ptychography. We evaluate our method both on natural images and real test objects to validate its effectiveness for ptychographic image reconstruction.
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