arXiv:2503.08276cs.CV2025-03被引 13

用人类审美反馈指导低光图像增强,实现局部精细调光。

PromptLNet: Region-Adaptive Aesthetic Enhancement via Prompt Guidance in Low-Light Enhancement Net

  • 基于人类审美评分训练评价模型,引导图像增强
  • 提出提示驱动的区域调光模块,支持局部细节优化
  • 在多个数据集上优于主流方法,适合需要美学质量的场景

通过人类偏好反馈提升大语言模型已成为主流,但极少应用于低光图像增强。现有方法多依赖客观指标(如FID、PSNR),导致模型虽数值表现好,却缺乏美感;且多数仅做全局提亮,缺乏细节优化,生成图像常需额外局部调整。为此,我们提出:1)收集多个低光图像数据集(如LOL、LOL2、LOM、DCIM、MEF等)中的人类审美评价文本与分数,训练低光图像美学评价模型,并结合优化算法微调扩散模型;2)设计提示驱动的亮度调节模块,可对特定区域或实例进行细粒度亮度与美学调整;3)在主流基准上评估,实验表明本方法不仅视觉效果更优,且更具灵活性与可控性,为提升图像美学质量提供新路径。

原文摘要 · Abstract (English)

Learning and improving large language models through human preference feedback has become a mainstream approach, but it has rarely been applied to the field of low-light image enhancement. Existing low-light enhancement evaluations typically rely on objective metrics (such as FID, PSNR, etc.), which often result in models that perform well objectively but lack aesthetic quality. Moreover, most low-light enhancement models are primarily designed for global brightening, lacking detailed refinement. Therefore, the generated images often require additional local adjustments, leading to research gaps in practical applications. To bridge this gap, we propose the following innovations: 1) We collect human aesthetic evaluation text pairs and aesthetic scores from multiple low-light image datasets (e.g., LOL, LOL2, LOM, DCIM, MEF, etc.) to train a low-light image aesthetic evaluation model, supplemented by an optimization algorithm designed to fine-tune the diffusion model. 2) We propose a prompt-driven brightness adjustment module capable of performing fine-grained brightness and aesthetic adjustments for specific instances or regions. 3) We evaluate our method alongside existing state-of-the-art algorithms on mainstream benchmarks. Experimental results show that our method not only outperforms traditional methods in terms of visual quality but also provides greater flexibility and controllability, paving the way for improved aesthetic quality.

低光增强美学优化提示引导扩散模型

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