通信学报 ›› 2017, Vol. 38 ›› Issue (4): 158-165.doi: 10.11959/j.issn.1000-436x.2017087

• 学术论文 • 上一篇    下一篇

基于黄斑距离优化的视网膜OCT图像层次分割方法

李建锋1,鲁易周2   

  1. 1 吉首大学信息科学与工程学院,湖南 吉首 416000
    2 中南大学信息科学与工程学院,湖南 长沙 410083
  • 修回日期:2017-03-10 出版日期:2017-04-01 发布日期:2017-07-20
  • 作者简介:李建锋(1979-),男,土家族,湖南张家界人,博士,吉首大学副教授、硕士生导师,主要研究方向为医学图像处理。|鲁易周(1994-),男,浙江绍兴人,主要研究方向为医学图像处理。
  • 基金资助:
    国家自然科学基金资助项目(61562029);国家自然科学基金资助项目(61262032);湖南省自然科学基金资助项目(2015JJ3100)

Optimum hierarchical segmentation of OCT images in retina based on macular distance

Jian-feng LI1,Yi-zhou LU2   

  1. 1 College of Information Science and Engineering,Jishou University,Jishou 416000,China
    2 School of Information Science and Engineering,Central South University,Changsha 410083,China
  • Revised:2017-03-10 Online:2017-04-01 Published:2017-07-20
  • Supported by:
    The National Natural Science Foundation of China(61562029);The National Natural Science Foundation of China(61262032);The Natural Science Foundation of Hunan Province(2015JJ3100)

摘要:

视网膜分层是视盘结构三维分析、青光眼三维特征提取的基础,为改善视网膜 OCT 图像的层次分割效果,提出了一个基于强度的二维视网膜黄斑 OCT 图像多层结构分割算法。分割方法通过预处理、滤波等操作,计算出视网膜OCT图像中每个A-scan的强度和强度梯度值,能很好地分割出视网膜OCT图像中的RNFL上界、IS和OS分界线、RPE层下界等,并用最短距离计算的黄斑距离策略对黄斑部位分层结果进行再优化,从而实现视网膜OCT图像的层次分割。实验结果表明,所提算法优化效果好,时间复杂度低,运行速度较快。

关键词: 视网膜, 黄斑, 光学相干断层扫描, 图像分割

Abstract:

Retina layering was the basis of optic disc structure analysis and 3D feature extraction of glaucoma.In order to improve the layering effect of retinal OCT images,an intensity based multilayer segmentation algorithm for two-dimensional retinal OCT images was proposed.Through preprocessing and filtering operation,the segmentation algorithm calculated the intensity and intensity gradient of each A-scan in the retinal OCT image to obtain the upper bound RNFL,the dividing line IS and OS,and the lower bound RPE.Then macular distance strategy,calculated by the shortest distance,was used to further optimize the layering result of macular area,so as to achieve layering segmentation of the retinal OCT images.The experimental results show the algorithm has good optimization effect,low time complexity and fast running speed.

Key words: retina, macular, optical coherence tomography, image segmentation

中图分类号: 

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