Shuchang Zhang

2 accepted papers

2025

Rethinking Gradient Step Denoiser: Towards Truly Pseudo-Contractive Operator

Shuchang Zhang, Yaoyun Zeng, Kangkang Deng, Hongxia Wang

NeurIPS 2025poster

Learning pseudo-contractive denoisers is a fundamental challenge in the theoretical analysis of Plug-and-Play (PnP) methods and the Regularization by Denoising (RED) framework. While spectral methods attempt to address this challenge using the power iteration method, they fail to guarantee the trul…

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2024

A Sequential Averaging Plug-and-Play Method for Image Restoration Via Fixed-Point Projection

Shuchang Zhang, Hongxia Wang

ICASSP 2024accepted

Plug-and-Play (PnP) methods are increasingly popular for solving image restoration problems. RED-PRO (regularization by denoising via fixed-point projection) is an important framework that bridges RED and PnP. Balancing the gradient method for data fidelity and the denoiser in RED-PRO with suitable…

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