《计算机应用》唯一官方网站 ›› 2026, Vol. 46 ›› Issue (2): 546-554.DOI: 10.11772/j.issn.1001-9081.2025020222
• 多媒体计算与计算机仿真 • 上一篇
收稿日期:2025-03-06
修回日期:2025-06-15
接受日期:2025-06-23
发布日期:2025-08-08
出版日期:2026-02-10
通讯作者:
李广明
作者简介:张日丰(2000—),男,广东茂名人,硕士研究生,CCF会员,主要研究方向:计算机视觉、低光图像增强基金资助:
Rifeng ZHANG, Guangming LI(
), Yurong OUYANG
Received:2025-03-06
Revised:2025-06-15
Accepted:2025-06-23
Online:2025-08-08
Published:2026-02-10
Contact:
Guangming LI
About author:ZHANG Rifeng, born in 2000, M. S. candidate. His research interests include computer vision, low-light image enhancement.Supported by:摘要:
近年来,基于深度学习的低光图像增强方法受Retinex理论的启发,先估计照明图调整亮度,再恢复反射率以实现低光增强。因此,通过分析低光场景反射图与参考反射图的相似度,提出一种反射先验图引导的低光图像增强网络(RP-Net)。首先,在Lab色彩空间分解出相似反射图,并设计反射先验特征自适应提取器(RPAE)在主干网络以不同尺度从相似反射图中重新编码和筛选引导特征;其次,通过设计的反射先验特征引导注意力块(RPGB)将引导信息注入主干网络。此外,针对传统逐像素L1损失的局限性,从频域分析的视角出发,设计一种频域调和损失函数,以从全局频谱分布优化增强效果。在LOLv1、LOLv2和LSRW数据集上的实验结果表明,所提方法在结构相似性(SSIM)上优于现有主流方法,在LOLv2-syn和LSRW数据集上得到的峰值信噪比(PSNR)相较于Retinexformer和SAFNet (Spatial And Frequency Network)分别提高了1.29 dB和2.08 dB,并且在色彩保真和增强效果的平衡上表现出色。
中图分类号:
张日丰, 李广明, 欧阳裕荣. 反射先验图引导的低光图像增强网络[J]. 计算机应用, 2026, 46(2): 546-554.
Rifeng ZHANG, Guangming LI, Yurong OUYANG. Low-light image enhancement network guided by reflection prior map[J]. Journal of Computer Applications, 2026, 46(2): 546-554.
| 方法 | 复杂度 | LOLv1 | LOLv2-real | LOLv2-syn | ||||
|---|---|---|---|---|---|---|---|---|
| GFLOPs | Params/106 | PSNR/dB | SSIM | PSNR/dB | SSIM | PSNR/dB | SSIM | |
| RetinexNet[ | 0.840 | 584.470 | 16.77 | 0.560 | 16.09 | 0.401 | 17.13 | 0.762 |
| Zero-DCE[ | 0.075 | 4.830 | 14.86 | 0.559 | 16.06 | 0.580 | 17.71 | 0.810 |
| EnlightenGAN[ | 61.010 | 114.350 | 17.48 | 0.651 | 18.23 | 0.617 | 16.57 | 0.734 |
| RUAS[ | 0.830 | 0.003 | 18.23 | 0.720 | 18.37 | 0.723 | 16.55 | 0.652 |
| KinD[ | 34.990 | 8.020 | 20.86 | 0.790 | 14.74 | 0.641 | 13.29 | 0.578 |
| Restormer[ | 144.250 | 26.130 | 22.43 | 0.823 | 19.94 | 0.827 | 21.41 | 0.830 |
| MIRNet[ | 785.000 | 31.760 | 24.14 | 0.830 | 20.02 | 0.820 | 21.94 | 0.876 |
| SNR-Net[ | 26.350 | 4.010 | 24.61 | 0.842 | 21.48 | 0.849 | 24.14 | 0.928 |
| Retinexformer[ | 15.570 | 1.610 | 25.16 | 0.845 | 22.79 | 0.840 | 25.67 | 0.930 |
| HVI-CIDNet[ | 8.130 | 1.970 | 23.23 | 0.840 | 20.37 | 0.846 | 25.13 | 0.939 |
| RP-Net | 22.060 | 2.060 | 24.37 | 0.857 | 22.90 | 0.868 | 26.96 | 0.944 |
表1 LOLv1和LOLv2数据集上不同方法的客观评价结果
Tab. 1 Objective evaluation results of different methods on LOLv1 and LOLv2 datasets
| 方法 | 复杂度 | LOLv1 | LOLv2-real | LOLv2-syn | ||||
|---|---|---|---|---|---|---|---|---|
| GFLOPs | Params/106 | PSNR/dB | SSIM | PSNR/dB | SSIM | PSNR/dB | SSIM | |
| RetinexNet[ | 0.840 | 584.470 | 16.77 | 0.560 | 16.09 | 0.401 | 17.13 | 0.762 |
| Zero-DCE[ | 0.075 | 4.830 | 14.86 | 0.559 | 16.06 | 0.580 | 17.71 | 0.810 |
| EnlightenGAN[ | 61.010 | 114.350 | 17.48 | 0.651 | 18.23 | 0.617 | 16.57 | 0.734 |
| RUAS[ | 0.830 | 0.003 | 18.23 | 0.720 | 18.37 | 0.723 | 16.55 | 0.652 |
| KinD[ | 34.990 | 8.020 | 20.86 | 0.790 | 14.74 | 0.641 | 13.29 | 0.578 |
| Restormer[ | 144.250 | 26.130 | 22.43 | 0.823 | 19.94 | 0.827 | 21.41 | 0.830 |
| MIRNet[ | 785.000 | 31.760 | 24.14 | 0.830 | 20.02 | 0.820 | 21.94 | 0.876 |
| SNR-Net[ | 26.350 | 4.010 | 24.61 | 0.842 | 21.48 | 0.849 | 24.14 | 0.928 |
| Retinexformer[ | 15.570 | 1.610 | 25.16 | 0.845 | 22.79 | 0.840 | 25.67 | 0.930 |
| HVI-CIDNet[ | 8.130 | 1.970 | 23.23 | 0.840 | 20.37 | 0.846 | 25.13 | 0.939 |
| RP-Net | 22.060 | 2.060 | 24.37 | 0.857 | 22.90 | 0.868 | 26.96 | 0.944 |
| 方法 | PSNR/dB | SSIM | 方法 | PSNR/dB | SSIM |
|---|---|---|---|---|---|
| RetinexNet[ | 15.90 | 0.373 | LLFormer[ | 17.16 | 0.522 |
| Zero-DCE[ | 15.83 | 0.466 | SAFNet[ | 17.23 | 0.550 |
| EnlightenGAN[ | 16.31 | 0.469 | RP-Net | 19.31 | 0.580 |
| KinD++[ | 16.47 | 0.492 |
表2 LSRW数据集上的客观评价结果
Tab. 2 Objective evaluation results on LSRW dataset
| 方法 | PSNR/dB | SSIM | 方法 | PSNR/dB | SSIM |
|---|---|---|---|---|---|
| RetinexNet[ | 15.90 | 0.373 | LLFormer[ | 17.16 | 0.522 |
| Zero-DCE[ | 15.83 | 0.466 | SAFNet[ | 17.23 | 0.550 |
| EnlightenGAN[ | 16.31 | 0.469 | RP-Net | 19.31 | 0.580 |
| KinD++[ | 16.47 | 0.492 |
| Loss | PSNR | Loss | PSNR |
|---|---|---|---|
| Lspa | 24.11 | Lspa+0.2×Lfre | 23.92 |
| Lspa+0.05×Lfre | 24.29 | Lspa+0.1×Lfre(本文) | 24.37 |
| Lspa+0.15×Lfre | 24.08 |
表3 不同损失函数的客观评价结果 (dB)
Tab. 3 Objective evaluation results of different loss functions
| Loss | PSNR | Loss | PSNR |
|---|---|---|---|
| Lspa | 24.11 | Lspa+0.2×Lfre | 23.92 |
| Lspa+0.05×Lfre | 24.29 | Lspa+0.1×Lfre(本文) | 24.37 |
| Lspa+0.15×Lfre | 24.08 |
| 方法 | PSNR | 方法 | PSNR |
|---|---|---|---|
| 变体1 | 26.61 | 变体4 | 26.40 |
| 变体2 | 26.61 | 变体5 | 26.76 |
| 变体3 | 26.66 | 本文方法 | 26.96 |
表4 不同变体在LOLv2-syn数据集上的客观评价结果 (dB)
Tab. 4 Objective evaluation results of different variants on LOLv2-syn dataset
| 方法 | PSNR | 方法 | PSNR |
|---|---|---|---|
| 变体1 | 26.61 | 变体4 | 26.40 |
| 变体2 | 26.61 | 变体5 | 26.76 |
| 变体3 | 26.66 | 本文方法 | 26.96 |
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