Paper Detail
Sean Man, Ron Raphaeli, Matan Kleiner, Or Ronai
In this paper, we introduce SP^3, a novel Plug-and-Play algorithm that accelerates maximum a posteriori image restoration by replacing denoisers with Spherical Encoders (SE) as generative priors. SP^3 approximates the intractable proximal prior step by utilizing the SE tightly structured latent space as a robust projection onto the natural image manifold. Alternating this projection with a closed-form data-consistency step, via Half-Quadratic Splitting, achieves stable convergence without requiring gradient computation during inference. This unique formulation unlocks "anytime" restoration capabilities, producing sharp, plausible images from the first iteration. Evaluations across a variety of image restoration tasks demonstrate that SP^3 achieves perceptual quality comparable to state-of-the-art zero-shot diffusion and flow methods while being 3-630times faster.
No structured notes yet. Add `summary_sections`, `why_relevant`, `claim_impact`, or `next_action` in `papers.jsonl` to enrich this view.
No ranking explanation is available yet.
No tags.
@misc{man2026sp,
title = {SP\textasciicircum{}3: Spherical Priors for Plug-and-Play Restoration},
author = {Sean Man and Ron Raphaeli and Matan Kleiner and Or Ronai},
year = {2026},
abstract = {In this paper, we introduce SP\textasciicircum{}3, a novel Plug-and-Play algorithm that accelerates maximum a posteriori image restoration by replacing denoisers with Spherical Encoders (SE) as generative priors. SP\textasciicircum{}3 approximates the intractable proximal prior step by utilizing the SE tightly structured latent space as a robust projection onto the natural image manifold. Alternating this projection with a closed-form data-consistency step, via Half-Quadratic Splitting, achieves stable convergence without requir},
url = {https://huggingface.co/papers/2606.16396},
keywords = {Plug-and-Play, maximum a posteriori, denoisers, Spherical Encoders, generative priors, latent space, natural image manifold, Half-Quadratic Splitting, stable convergence, anytime restoration, perceptual quality, zero-shot diffusion, flow methods, code available, huggingface daily},
eprint = {2606.16396},
archiveprefix = {arXiv},
}
{}