Retinal vessel extraction by a combined neural network-wavelet enhancement method

  • Authors:
  • Leonarda Carnimeo;Vitoantonio Bevilacqua;Lucia Cariello;Giuseppe Mastronardi

  • Affiliations:
  • Department of Electrical and Electronics, Polytechnic of Bari, Bari, Italy;Department of Electrical and Electronics, Polytechnic of Bari, Bari, Italy e.B.I.S., s.r.l., Spin-Off of Polytechnic of Bari, Bari, Italy;Department of Electrical and Electronics, Polytechnic of Bari, Bari, Italy e.B.I.S., s.r.l., Spin-Off of Polytechnic of Bari, Bari, Italy;Department of Electrical and Electronics, Polytechnic of Bari, Bari, Italy e.B.I.S., s.r.l., Spin-Off of Polytechnic of Bari, Bari, Italy

  • Venue:
  • ICIC'09 Proceedings of the Intelligent computing 5th international conference on Emerging intelligent computing technology and applications
  • Year:
  • 2009

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Abstract

This paper presents a combined approach to automatic extraction of blood vessels in retinal images. The proposed procedure is composed of two phases: a wavelet transform-based preprocessing phase and a NN-based one. Several neural net topologies and training algorithms are considered with the aim of selecting an effective combined method. Human retinal fundus images, derived from the publicly available ophthalmic database DRIVE, are processed to detect retinal vessels. The approach is tested by considering performances in terms of sensitivity and specificity values obtained from vessel classification. The quality of vessel identifications is evaluated on obtained image by computing both sensitivity values and specificity ones and by relating them in ROC curves. A comparison of performances by ROC curve areas for various methods is reported.