3 papers
math.NA2026
MAGPIE: Multilevel-Adaptive-Guided Solver for Ptychographic Phase Retrieval
Borong Zhang, Qin Li, Zichao Wendy Di
We introduce MAGPIE (Multilevel-Adaptive-Guided Ptychographic Iterative Engine), a stochastic multigrid solver for the ptychographic phase-retrieval problem. The ptychographic phas…
math.NA2025
Stochastic Multigrid Method for Blind Ptychographic Phase Retrieval
Borong Zhang, Junjing Deng, Yi Jiang +1
We present eMAGPIE (extended Multilevel-Adaptive-Guided Ptychographic Iterative Engine), a stochastic multigrid method for blind ptychographic phase retrieval that jointly recovers…
cs.LG2025
Back-Projection Diffusion: Solving the Wideband Inverse Scattering Problem with Diffusion Models
Borong Zhang, MartÃn Guerra, Qin Li +1
We present Wideband Back-Projection Diffusion, an end-to-end probabilistic framework for approximating the posterior distribution induced by the inverse scattering map from wideban…