《计算机应用》唯一官方网站 ›› 2023, Vol. 43 ›› Issue (10): 3275-3281.DOI: 10.11772/j.issn.1001-9081.2022091437

• 多媒体计算与计算机仿真 • 上一篇    

基于U-Net的多尺度特征增强视网膜血管分割算法

张志昂1(), 廖光忠2   

  1. 1.武汉科技大学 计算机科学与技术学院,武汉 430065
    2.智能信息处理与实时工业系统湖北省重点实验室(武汉科技大学),武汉 430065
  • 收稿日期:2022-09-28 修回日期:2022-11-28 接受日期:2022-12-13 发布日期:2023-04-11 出版日期:2023-10-10
  • 通讯作者: 张志昂
  • 作者简介:廖光忠(1969—),男,贵州贵阳人,副教授,硕士,CCF会员,主要研究方向:物联网、信息安全。
  • 基金资助:
    武汉市重点研发计划项目(2022012202015070)

Multi-scale feature enhanced retinal vessel segmentation algorithm based on U-Net

Zhiang ZHANG1(), Guangzhong LIAO2   

  1. 1.School of Computer Science and Technology,Wuhan University of Science and Technology,Wuhan Hubei 430065,China
    2.Hubei Province Key Laboratory of Intelligent Information Processing and Real?time Industrial System (Wuhan University of Science and Technology),Wuhan Hubei 430065,China
  • Received:2022-09-28 Revised:2022-11-28 Accepted:2022-12-13 Online:2023-04-11 Published:2023-10-10
  • Contact: Zhiang ZHANG
  • About author:LIAO Guangzhong, born in 1969, M. S., associate professor. His research interests include internet of things, information safety.
  • Supported by:
    Key Research and Development Program of Wuhan(2022012202015070)

摘要:

针对传统视网膜血管分割算法存在血管分割精度低和病灶区域误分割等缺点,提出一种基于U-Net的多尺度特征增强视网膜血管分割算法(MFEU-Net)。首先,为解决梯度消失问题,设计一种改进的特征信息增强残差模块(FIE-RM)替代U-Net的卷积块;其次,为扩大感受野并提高对血管信息特征的抽取能力,在U-Net的底部引入多尺度密集空洞卷积模块;最后,为减少编解码过程中的信息损失,在U-Net的跳跃连接处构建多尺度通道增强模块。在DRIVE(Digital Retinal Images for Vessel Extraction)和CHASE_DB1数据集上的实验结果表明,与在视网膜血管分割方面表现次优的算法CS-Net(Channel and Spatial attention Network)相比,MFEU-Net的F1分数分别提高了0.35和1.55个百分点,曲线下面积(AUC)分别提高了0.34和1.50个百分点,这验证了MFEU-Net可以有效提高对视网膜血管分割的准确性和鲁棒性。

关键词: 视网膜血管分割, U-Net, 多尺度信息, 密集空洞卷积, 残差网络, 病灶区域

Abstract:

Aiming at the shortcomings of traditional retinal vessel segmentation algorithm such as low accuracy of vessel segmentation and mis-segmentation of focal areas, a Multi-scale Feature Enhanced retinal vessel segmentation algorithm based on U-Net (MFEU-Net) was proposed. Firstly, in order to solve the vanishing gradient problem, an improved Feature Information Enhancement Residual Module (FIE-RM) was designed to replace the convolution block of U-Net. Secondly, in order to enlarge the receptive field and improve the extraction ability of vascular information features, a multi-scale dense atrous convolution module was introduced at the bottom of U-Net. Finally, in order to reduce the information loss in the process of encoding and decoding, a multi-scale channel enhancement module was constructed at the skip connection of U-Net. Experimental results on Digital Retinal Images for Vessel Extraction (DRIVE) and CHASE_DB1 datasets show that compared with CS-Net (Channel and Spatial attention Network), the suboptimal algorithm in retinal vessel segmentation, MFEU-Net has the F1 score improved by 0.35 and 1.55 percentage points respectively, and the Area Under Curve (AUC) improved by 0.34 and 1.50 percentage points respectively. It is verified that MFEU-Net can improve the accuracy and robustness of retinal vessel segmentation effectively.

Key words: retinal vessel segmentation, U-Net, multi-scale information, dense atrous convolution, residual network, focal area

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