《计算机应用》唯一官方网站 ›› 2023, Vol. 43 ›› Issue (4): 1240-1247.DOI: 10.11772/j.issn.1001-9081.2022030479
所属专题: 多媒体计算与计算机仿真
收稿日期:
2022-04-13
修回日期:
2022-06-07
接受日期:
2022-06-14
发布日期:
2023-04-11
出版日期:
2023-04-10
通讯作者:
祖佳贞
作者简介:
周永霞(1975—),男,浙江诸暨人,副教授,博士,主要研究方向:机器视觉、人工智能;基金资助:
Jiazhen ZU(), Yongxia ZHOU, Le CHEN
Received:
2022-04-13
Revised:
2022-06-07
Accepted:
2022-06-14
Online:
2023-04-11
Published:
2023-04-10
Contact:
Jiazhen ZU
About author:
ZHOU Yongxia, born in 1975, Ph. D., associate professor. His research interests include machine vision, artificial intelligence.Supported by:
摘要:
在低光条件下拍摄的照片会因曝光不足而产生一系列的视觉问题,如亮度低、信息丢失、噪声和颜色失真等。为了解决上述问题,提出一个结合注意力的双分支残差低光照图像增强网络。首先,采用改进InceptionV2提取浅层特征;其次,使用残差特征提取块(RFB)和稠密残差特征提取块(DRFB)提取深层特征;然后,融合浅层和深层特征,并将融合结果输入亮度调整块(BAM)调整亮度,最终得到增强图像。同时,结合注意力机制设计特征融合块(FFM)捕获重要的特征信息,以帮助恢复低光照图像的暗部区域。此外,引入一个联合损失函数从多方面衡量网络训练损失。实验结果表明,相较于鲁棒的视网膜大脑皮层模型(RRM)、Zero-DCE(Zero-Reference Deep Curve Estimation)和EnlightenGAN(Enlighten Generative Adversarial Network),在LOL(LOw-Light)数据集上,所提网络的峰值信噪比(PSNR)指标分别提高了49.9%、40.0%和18.5%;在LOL-V2数据集上,结构相似性(SSIM)指标分别提高了20.3%、50.0%和34.5%。所提网络在提高低光照图像亮度的同时降低了噪声,减少了颜色失真和伪影,得到的增强图像更加清晰自然。
中图分类号:
祖佳贞, 周永霞, 陈乐. 结合注意力的双分支残差低光照图像增强[J]. 计算机应用, 2023, 43(4): 1240-1247.
Jiazhen ZU, Yongxia ZHOU, Le CHEN. Dual-branch residual low-light image enhancement combined with attention[J]. Journal of Computer Applications, 2023, 43(4): 1240-1247.
模块组合 | PSNR/dB | SSIM | 模块组合 | PSNR/dB | SSIM |
---|---|---|---|---|---|
M1 | 22.61 | 0.854 | M5 | 18.52 | 0.803 |
M2 | 22.37 | 0.864 | M6 | 21.23 | 0.825 |
M3 | 21.55 | 0.862 | M7 | 22.48 | 0.865 |
M4 | 21.47 | 0.860 | 本文算法 | 22.73 | 0.870 |
表1 不同模块组合的客观评价结果
Tab. 1 Objective evaluation results of different module combinations
模块组合 | PSNR/dB | SSIM | 模块组合 | PSNR/dB | SSIM |
---|---|---|---|---|---|
M1 | 22.61 | 0.854 | M5 | 18.52 | 0.803 |
M2 | 22.37 | 0.864 | M6 | 21.23 | 0.825 |
M3 | 21.55 | 0.862 | M7 | 22.48 | 0.865 |
M4 | 21.47 | 0.860 | 本文算法 | 22.73 | 0.870 |
损失组合名称 | PSNR/dB | SSIM | 损失组合名称 | PSNR/dB | SSIM |
---|---|---|---|---|---|
L1 | 19.88 | 0.842 | L3 | 22.11 | 0.861 |
L2 | 21.37 | 0.858 | 本文算法 | 22.73 | 0.870 |
表2 不同损失组合的客观评价结果
Tab. 2 Objective evaluation results of different loss combinations
损失组合名称 | PSNR/dB | SSIM | 损失组合名称 | PSNR/dB | SSIM |
---|---|---|---|---|---|
L1 | 19.88 | 0.842 | L3 | 22.11 | 0.861 |
L2 | 21.37 | 0.858 | 本文算法 | 22.73 | 0.870 |
算法 | LOL | DICM | LIME | MEF | ||
---|---|---|---|---|---|---|
PSNR/dB | SSIM | NIQE | NIQE | |||
LIME | 16.92 | 0.504 | 8.795 | 3.783 | 4.347 | 3.827 |
SRIE | 12.28 | 0.509 | 7.716 | 3.173 | 3.469 | 3.204 |
MF | 16.69 | 0.508 | 9.713 | 3.544 | 4.103 | 3.400 |
NPE | 16.97 | 0.484 | 9.135 | 3.521 | 3.840 | 3.547 |
RRM | 13.88 | 0.664 | 3.952 | 3.406 | 4.033 | 3.883 |
Retinex-Net | 14.98 | 0.328 | 9.729 | 4.320 | 4.908 | 4.905 |
GLADNet | 16.94 | 0.552 | 6.797 | 3.114 | 3.404 | 3.180 |
MBLLEN | 17.90 | 0.694 | 4.266 | 2.665 | 3.647 | 3.170 |
DeepUPE | 12.90 | 0.465 | 7.994 | 2.954 | 3.462 | 3.178 |
EnlightenGAN | 17.56 | 0.666 | 4.815 | 2.530 | 3.295 | 3.053 |
Zero-DCE | 14.86 | 0.562 | 8.223 | 2.828 | 3.789 | 3.309 |
DLN | 21.95 | 0.807 | 3.656 | 2.734 | 3.601 | 3.523 |
本文算法 | 20.80 | 0.822 | 3.638 | 2.523 | 3.255 | 2.990 |
表3 不同算法在LOL、DICM、LIME、MEF测试集上的客观评价结果
Tab. 3 Objective evaluation results of different algorithms on LOL,DICM,LIME and MEF test sets
算法 | LOL | DICM | LIME | MEF | ||
---|---|---|---|---|---|---|
PSNR/dB | SSIM | NIQE | NIQE | |||
LIME | 16.92 | 0.504 | 8.795 | 3.783 | 4.347 | 3.827 |
SRIE | 12.28 | 0.509 | 7.716 | 3.173 | 3.469 | 3.204 |
MF | 16.69 | 0.508 | 9.713 | 3.544 | 4.103 | 3.400 |
NPE | 16.97 | 0.484 | 9.135 | 3.521 | 3.840 | 3.547 |
RRM | 13.88 | 0.664 | 3.952 | 3.406 | 4.033 | 3.883 |
Retinex-Net | 14.98 | 0.328 | 9.729 | 4.320 | 4.908 | 4.905 |
GLADNet | 16.94 | 0.552 | 6.797 | 3.114 | 3.404 | 3.180 |
MBLLEN | 17.90 | 0.694 | 4.266 | 2.665 | 3.647 | 3.170 |
DeepUPE | 12.90 | 0.465 | 7.994 | 2.954 | 3.462 | 3.178 |
EnlightenGAN | 17.56 | 0.666 | 4.815 | 2.530 | 3.295 | 3.053 |
Zero-DCE | 14.86 | 0.562 | 8.223 | 2.828 | 3.789 | 3.309 |
DLN | 21.95 | 0.807 | 3.656 | 2.734 | 3.601 | 3.523 |
本文算法 | 20.80 | 0.822 | 3.638 | 2.523 | 3.255 | 2.990 |
算法 | PSNR/dB | SSIM | FSIM |
---|---|---|---|
LIME | 17.78 | 0.499 | 0.886 |
SRIE | 15.10 | 0.541 | 0.929 |
MF | 18.73 | 0.509 | 0.911 |
NPE | 17.33 | 0.464 | 0.863 |
RRM | 17.34 | 0.723 | 0.909 |
DeepUPE | 14.81 | 0.483 | 0.924 |
EnlightenGAN | 18.68 | 0.647 | 0.926 |
Zero-DCE | 18.06 | 0.580 | 0.933 |
DRBN | 20.13 | 0.830 | 0.946 |
本文算法 | 22.73 | 0.870 | 0.967 |
表4 不同算法在LOL-V2测试集上的客观评价结果
Tab. 4 Objective evaluation results of different algorithms on LOL-V2 test set
算法 | PSNR/dB | SSIM | FSIM |
---|---|---|---|
LIME | 17.78 | 0.499 | 0.886 |
SRIE | 15.10 | 0.541 | 0.929 |
MF | 18.73 | 0.509 | 0.911 |
NPE | 17.33 | 0.464 | 0.863 |
RRM | 17.34 | 0.723 | 0.909 |
DeepUPE | 14.81 | 0.483 | 0.924 |
EnlightenGAN | 18.68 | 0.647 | 0.926 |
Zero-DCE | 18.06 | 0.580 | 0.933 |
DRBN | 20.13 | 0.830 | 0.946 |
本文算法 | 22.73 | 0.870 | 0.967 |
算法 | PSNR/dB | SSIM | FSIM |
---|---|---|---|
LIME | 17.19 | 0.764 | 0.872 |
SRIE | 14.80 | 0.668 | 0.873 |
MF | 17.50 | 0.773 | 0.914 |
NPE | 16.60 | 0.776 | 0.904 |
RRM | 17.15 | 0.730 | 0.877 |
DeepUPE | 14.28 | 0.623 | 0.847 |
EnlightenGAN | 16.49 | 0.771 | 0.888 |
Zero-DCE | 17.76 | 0.814 | 0.926 |
DLN | 18.12 | 0.840 | 0.932 |
本文算法 | 22.49 | 0.910 | 0.973 |
表5 不同算法在LOL-V2合成测试集上的客观评价结果
Tab. 5 Objective evaluation results of different algorithms on LOL-V2 synthetic test set
算法 | PSNR/dB | SSIM | FSIM |
---|---|---|---|
LIME | 17.19 | 0.764 | 0.872 |
SRIE | 14.80 | 0.668 | 0.873 |
MF | 17.50 | 0.773 | 0.914 |
NPE | 16.60 | 0.776 | 0.904 |
RRM | 17.15 | 0.730 | 0.877 |
DeepUPE | 14.28 | 0.623 | 0.847 |
EnlightenGAN | 16.49 | 0.771 | 0.888 |
Zero-DCE | 17.76 | 0.814 | 0.926 |
DLN | 18.12 | 0.840 | 0.932 |
本文算法 | 22.49 | 0.910 | 0.973 |
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