Boosting Flow-based Generative Super-Resolution Models via Learned Prior
<|reference_start|>Boosting Flow-based Generative Super-Resolution Models via Learned Prior: Flow-based super-resolution (SR) models have demonstrated astonishing capabilities in generating high-quality images. However, these methods encounter several challenges during image generation, such as grid artifacts, exploding inverses, and suboptimal results due to a fixed sampling temperature. To overcome these issues, this work introduces a conditional learned prior to the inference phase of a flow-based SR model. This prior is a latent code predicted by our proposed latent module conditioned on the low-resolution image, which is then transformed by the flow model into an SR image. Our framework is designed to seamlessly integrate with any contemporary flow-based SR model without modifying its architecture or pre-trained weights. We evaluate the effectiveness of our proposed framework through extensive experiments and ablation analyses. The proposed framework successfully addresses all the inherent issues in flow-based SR models and enhances their performance in various SR scenarios. Our code is available at: https://github.com/liyuantsao/BFSR<|reference_end|>
@article{tsao2024boosting,
    title={Boosting Flow-based Generative Super-Resolution Models via Learned Prior},
    author={Li-Yuan Tsao, Yi-Chen Lo, Chia-Che Chang, Hao-Wei Chen, Roy Tseng,
  Chien Feng, Chun-Yi Lee},
    journal={arXiv preprint arXiv:2403.10988},
    year={2024},
    archivePrefix={arXiv},
    eprint={2403.10988},
    primaryClass={cs.CV cs.AI}
}