arXiv AI

Everything at Every Scale: Scale-Invariant Diffusion with Continuous Super-Resolution

SKILD is a scale‑invariant diffusion model that unifies image generation and continuous super‑resolution within a single unconditional framework. It achieves this by designing a forward process that progressively removes fine‑scale content while adding spectrum‑matched Gaussian noise, treating scale as an explicit diffusion coordinate. The same trained reverse process can generate images or perform super‑resolution simply by changing the starting timestep, yielding strong results on CIFAR‑10, ImageNet, and critical Ising models without task‑specific architecture or retraining.

arXiv Computer Vision
Sep 23

MIAR: Medical Image Super-Resolution With Autoregressive Modeling

MIAR introduces a multi‑scale autoregressive framework for medical image super‑resolution, treating the task as a conditional, progressive next‑scale prediction. It incorporates a Scale‑Adaptive Structural Decoder to preserve structural fidelity and uses a hierarchical beam search during inference to reduce recursive error accumulation. Experiments show MIAR outperforms existing methods, achieving a 7.86% MUSIQ improvement and a 2.02× speedup over diffusion‑based approaches.

By Fang Li, Yinglong Li, Hongyu Wu, Yang Gao, Minwei Zhao, Aimin Hao
arXiv Computer Vision
Sep 3

SelfLift: Accelerating Few-Step Diffusion via Self-Recovering Resolution Transition

SelfLift is a progressive‑resolution framework that accelerates few‑step diffusion models by enabling late, self‑recovering transitions between low‑ and high‑resolution latents. It introduces a training‑free Artifact‑Aware Consistency Lift that uses disagreement between direct latent lifting and pixel‑VAE re‑encoding to detect and correct artifacts, and a self‑recovery policy that transfers high‑resolution guidance from an internal teacher. Experiments on FLUX.2‑Klein and Z‑Image‑Turbo show latency reductions of 41.5% and 44.1%, and overall speedups of 29.61× and 19.21× over 50‑step baselines while maintaining competitive generation quality.

By Tingyan Wen, Chenqian Yan, Xurui Peng, Xiazhang Fang, Shuai Wang, Xueqian Wang, Songwei Liu
arXiv Machine Learning
Sep 3

Perceptually Regularized Diffusion Model for Image Super-Resolution

The paper introduces a perceptually regularized diffusion framework for image super‑resolution, adding perceptual‑loss based regularization to the standard diffusion training objective. This approach incorporates prior knowledge to improve training convergence and encourages the recovery of meaningful image features. Experiments on benchmark datasets show enhanced perceptual quality while maintaining competitive distortion metrics.

By Chuxiangbo Wang, Pavithra Venkatachalapathy, Ying Liang, Min Wang, Jing Qin, Yifei Lou, Weihong Guo