Plug-and-Play Half-Quadratic Splitting for Ptychography

• URL: http://arxiv.org/abs/2412.02548v1
• Date: Tue, 03 Dec 2024 16:41:18 GMT
• Title: Plug-and-Play Half-Quadratic Splitting for Ptychography
• Authors: Alexander Denker, Johannes Hertrich, Zeljko Kereta, Silvia Cipiccia, Ecem Erin, Simon Arridge,
• Abstract summary: Ptychography is a coherent diffraction imaging method that uses phase retrieval techniques to reconstruct complex-valued images. It is computationally intensive and highly sensitive to noise, especially with illumination overlap. We propose a framework for integrating datadriven denoisers as implicit priors.
• Score: 37.92147368117171
• License:
• Abstract: 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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