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One-Step Effective Diffusion Network for Real-World Image Super-Resolution

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arxiv 2406.08177 v3 pith:77XU26J3 submitted 2024-06-12 eess.IV cs.CV

classification eess.IVcs.CV
keywords imagediffusionreal-isrosediffmethodsnetworknoiseone-step
verification ladder T0 review T1 audit T2 compute T3 formal
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The pre-trained text-to-image diffusion models have been increasingly employed to tackle the real-world image super-resolution (Real-ISR) problem due to their powerful generative image priors. Most of the existing methods start from random noise to reconstruct the high-quality (HQ) image under the guidance of the given low-quality (LQ) image. While promising results have been achieved, such Real-ISR methods require multiple diffusion steps to reproduce the HQ image, increasing the computational cost. Meanwhile, the random noise introduces uncertainty in the output, which is unfriendly to image restoration tasks. To address these issues, we propose a one-step effective diffusion network, namely OSEDiff, for the Real-ISR problem. We argue that the LQ image contains rich information to restore its HQ counterpart, and hence the given LQ image can be directly taken as the starting point for diffusion, eliminating the uncertainty introduced by random noise sampling. We finetune the pre-trained diffusion network with trainable layers to adapt it to complex image degradations. To ensure that the one-step diffusion model could yield HQ Real-ISR output, we apply variational score distillation in the latent space to conduct KL-divergence regularization. As a result, our OSEDiff model can efficiently and effectively generate HQ images in just one diffusion step. Our experiments demonstrate that OSEDiff achieves comparable or even better Real-ISR results, in terms of both objective metrics and subjective evaluations, than previous diffusion model-based Real-ISR methods that require dozens or hundreds of steps. The source codes are released at https://github.com/cswry/OSEDiff.

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Cited by 11 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Bridging Restoration and Generation Manifolds in One-Step Diffusion for Real-World Super-Resolution

    cs.CV 2026-04 unverdicted novelty 7.0 of 10

    IDaS-SR achieves one-step real-world super-resolution by bridging restoration and generation manifolds via adaptive inversion noise estimation and continuous trajectory steering.

  2. Bird-SR: Bidirectional Reward-Guided Diffusion for Real-World Image Super-Resolution

    cs.CV 2026-02 unverdicted novelty 7.0 of 10

    Bird-SR outperforms prior super-resolution methods on real images by guiding diffusion trajectories with bidirectional rewards, early structure optimization on synthetic pairs, and later perceptual rewards with dynami...

  3. Stream-DiffVSR: Low-Latency Streamable Video Super-Resolution via Auto-Regressive Diffusion

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    Stream-DiffVSR enables practical low-latency video super-resolution by combining a four-step distilled denoiser, auto-regressive temporal guidance, and a temporal processor in a strictly causal pipeline.

  4. LucidFlux: Caption-Free Photo-Realistic Image Restoration via a Large-Scale Diffusion Transformer

    cs.CV 2025-09 unverdicted novelty 7.0 of 10

    LucidFlux is a caption-free image restoration method that conditions a Flux.1 diffusion transformer with a dual-branch module from the degraded input and a proxy restoration plus SigLIP semantic features to outperform...

  5. The Devil is in the Dark Pixels: Toward Brightness Bias-Robust Denoising

    cs.CV 2026-07 conditional novelty 6.0 of 10

    BBRD, a drop-in replacement for MSE that normalizes per-brightness-band errors by their own noise variance and upweights the lagging band via softmax Group-DRO, improves dark, bright, and aggregate PSNR simultaneously...

  6. SR-Ground: Image Quality Grounding for Super-Resolved Content

    cs.CV 2026-05 unverdicted novelty 6.0 of 10

    The paper releases SR-Ground, a crowdsourced dataset for pixel-level segmentation of six artifact types in super-resolved images, and shows its use for training grounded IQA models and artifact-reducing fine-tuning.

  7. Bridging Restoration and Generation Manifolds in One-Step Diffusion for Real-World Super-Resolution

    cs.CV 2026-04 unverdicted novelty 6.0 of 10

    IDaS-SR performs one-step real-world super-resolution by predicting severity-aware timesteps to anchor low-quality latents and using continuous trajectory steering to balance structure and texture generation.

  8. Fine-structure Preserved Real-world Image Super-resolution via Transfer VAE Training

    cs.CV 2025-07 conditional novelty 6.0 of 10

    A transfer training scheme converts Stable Diffusion's 8x VAE into a 4x VAE that stays compatible with the pretrained UNet, improving fine-structure preservation in real-world super-resolution at lower FLOPs.

  9. Segment Any-Quality Images with Generative Latent Space Enhancement

    cs.CV 2025-03 unverdicted novelty 6.0 of 10

    GleSAM integrates latent diffusion into SAM and SAM2 to boost segmentation robustness on low-quality images using minimal extra parameters and a new LQSeg dataset.

  10. Towards Any-Quality Image Segmentation via Generative and Adaptive Latent Space Enhancement

    cs.CV 2026-01 unverdicted novelty 5.0 of 10

    GleSAM++ improves SAM robustness on degraded images by using generative enhancement, feature alignment, and adaptive degradation prediction while adding few parameters.

  11. Efficient Difficulty-Aware Dynamic Routing for Diffusion-Based Real-World Image Super-Resolution

    cs.CV 2026-07 reject novelty 4.0 of 10

    DDR-SR routes each real-world low-resolution image to one of two diffusion experts based on a high-frequency-loss difficulty score, using a low-compression VAE for hard images and a high-compression VAE for easy image...

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