Measurement of retinal arteriolar diameters from auto scale phase congruency with fuzzy weighting and L1 regularization.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal

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Author(s)

  • Joubin Nasehi Tehrani
  • Hong Yan
  • Meidong Zhu
  • Craig Jin
  • Alistair L McEwan

Detail(s)

Original languageEnglish
Pages (from-to)1434-1437
Journal / PublicationConference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference
Volume2012
Publication statusPublished - 2012
Externally publishedYes

Abstract

Manual measurements of small changes in retinal vascular diameter are slow and may be subject to considerable observer-related biases. Among the conventional automatic methods the sliding linear regression filter (SLRF) demonstrates the least scattered and most repeatable coefficients. For optimal performance it relies on the choice of the correct filter scale for different vessel sizes. A small scale extracts fine details at the expense noise sensitivity, while large scales have poor edge localization. Here we use auto scale phase congruency to select the filter scales with fuzzy weighting to reduce noise, and L1 regularization for edge smoothing. Our method uses a one dimensional analysis normal to the vessel and so is faster than the 2D phase congruency. In 65 vessels randomly selected from 20 images the proposed method showed better repeatability and over three times less scattering than conventional SLRF.

Citation Format(s)

Measurement of retinal arteriolar diameters from auto scale phase congruency with fuzzy weighting and L1 regularization. / Nasehi Tehrani, Joubin; Yan, Hong; Zhu, Meidong; Jin, Craig; McEwan, Alistair L.

In: Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference, Vol. 2012, 2012, p. 1434-1437.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)22_Publication in policy or professional journal