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prDeep: Robust Phase Retrieval with a Flexible Deep Network
Christopher Metzler · Phillip Schniter · Ashok Veeraraghavan · Richard Baraniuk

Thu Jul 12 09:15 AM -- 12:00 PM (PDT) @ Hall B #164

Phase retrieval algorithms have become an important component in many modern computational imaging systems. For instance, in the context of ptychography and speckle correlation imaging, they enable imaging past the diffraction limit and through scattering media, respectively. Unfortunately, traditional phase retrieval algorithms struggle in the presence of noise. Progress has been made recently on more robust algorithms using signal priors, but at the expense of limiting the range of supported measurement models (e.g., to Gaussian or coded diffraction patterns). In this work we leverage the regularization-by-denoising framework and a convolutional neural network denoiser to create {\em prDeep}, a new phase retrieval algorithm that is both robust and broadly applicable. We test and validate prDeep in simulation to demonstrate that it is robust to noise and can handle a variety of system models.

Author Information

Christopher Metzler (Rice University)
Phil Schniter (Ohio State)
Ashok Veeraraghavan (Rice University)
Richard Baraniuk (OpenStax / Rice University)

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