Journal of South China University of Technology (Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (2): 71-75,80.doi: 10.3969/j.issn.1000-565X.2011.02.012

• Electronics, Communication & Automation Technology • Previous Articles     Next Articles

Fast Automatic Localization of Optic Disc in Retinal Images

Zhao Xiao-fang1  Lin Tu-sheng1  Li Bi2   

  1. 1. South China university of technology, electronic and information institute, guangdong guangzhou 510640； 2. Guangdong university of foreign studies institute of information, guangdong guangzhou 510420
  • Received:2010-07-12 Revised:2010-09-17 Online:2011-02-25 Published:2011-01-02
  • Contact: 赵晓芳(1982-)，女，博士生，主要从事图像处理、模式识别研究 E-mail:aozhy119@126.com
  • About author:赵晓芳(1982-)，女，博士生，主要从事图像处理、模式识别研究
  • Supported by:

    国家自然科学基金资助项目(60972136)；广州市科技计划项目(2009J1一CA0I)

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Abstract:

Based on the structure of retinal blood vessels and the features of the optic disc（OD）,a fast automatic method of optic disc localization is proposed.In this method,first,the vertical coordinate of the OD is determined according to the distribution structure of the retinal blood vessel network.Then,the horizontal coordinate is located based on the OD brightness information and the relationship between the OD and the blood vessels.Finally,the OD is limited in a small window with the rough location of the OD as the center,and the OD center is precisely positioned via the Hough transform.By this method,neither prior segmentation of retinal blood vessels nor algorithm training is required.Experimental results indicate that the proposed method is of high localization accuracy and speed.

Key words: retinal images, optic disc, coordinate, Hough transform