ResearchResearch paperImage, Video & 3D Generation1 source · Oct 20, 2026

PixelSR: Pixel-Space Orthogonal Flow Decoupling for Real-World Image Super-Resolution

To address this challenge, we propose PixelSR, a novel single-stage Pixel Diffusion Transformer for Real-SR that operates directly in pixel space.

Key points

  • Latent diffusion models have recently achieved remarkable progress in Real-world Image Super-Resolution (Real-SR).
  • However, existing methods consistently exhibit a persistent seesaw effect: enhancing perceptual realism compromises structural fidelity.
  • Specifically, PixelSR consists of two core designs: Pixel-space Conditional Diffusion and Orthogonal Flow Decoupling.
  • The former establishes an effective pixel-space restoration framework by integrating spatially aligned LR conditioning, visual semantic guidance, and lightweight texture refinement, thereby bypassing VAE compression and enabling end-to-end optimization directly in RGB space.

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