提出DDR-Net,通过双域优化提升单图像去雾的细节恢复能力。
DDR-Net: Haze-Aware Dual-Domain Refinement for Single-Image Dehazing

- 设计多尺度雾霾先验提取器与梯度感知卷积块,增强结构特征捕捉
- 在瓶颈层融合空间与频率信息,显著改善雾霾区域特征表示
- 在真实世界数据集上超越现有方法,适合高保真去雾场景
单图像去雾旨在从雾霾退化的图像中恢复清晰场景。由于大气散射和真实雾霾分布的复杂性,该任务仍具挑战性。尽管近期端到端网络已取得良好效果,但瓶颈阶段特征细化不足与编码器-解码器架构中局部结构表征弱仍是主要限制。为此,我们提出雾霾感知双域优化网络(DDR-Net)。该方法包含三个模块:雾霾先验提取器(HPE)通过对下采样雾霾图像直接操作,提供多尺度雾霾感知先验;细节增强模块(DE Blocks)作为核心特征提取单元,通过梯度感知卷积捕获多尺度结构信息,增强边缘与纹理恢复;瓶颈处的空间-频率联合优化模块(SFBR)同时利用空间与频率信息,对瓶颈特征进行精细化重构。实验表明,该方法在真实世界基准测试中优于现有方法,在合成数据集上也表现竞争力。
原文摘要 · Abstract (English)
Single-image dehazing aims to recover clear scenes from haze-degraded images. It remains challenging due to the atmospheric scattering and the complexity of real-world haze distributions. Although recent end-to-end networks have achieved promising performance, two issues still limit their effectiveness: insufficient feature refinement at the bottleneck stage and weak local structural representation in encoder-decoder architectures. Thus, we propose a Haze-Aware Dual-Domain Refinement Network (DDR-Net) for single-image dehazing. Our method is built upon three modules: Haze Prior Extractor (HPE) provides multi-scale haze-aware priors by operating directly on downsampled hazy images; Detail-Enhanced Blocks (DE Blocks) serve as the core feature extraction units, capturing multi-scale structural information and enhancing edge and texture recovery via gradient-aware convolutions; and Spatial-Frequency Bottleneck Refinement (SFBR) at the bottleneck jointly exploits spatial and frequency information to refine bottleneck features. DDR-Net achieves more effective feature representation and reconstruction for haze removal. Extensive experiments on real-world benchmarks demonstrate that our method outperforms existing dehazing approaches. It achieves competitive performance on synthetic datasets.
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