A fast method for the detection of vascular structure in images, based on the continuous wavelet transform with the Morlet wavelet having a low central frequency

Eugene B. Postnikov, Maria O. Tsoy, Maxim A. Kurochkin, Dmitry E. Postnov

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

A manual measurement of blood vessels diameter is a conventional component of routine visual assessment of microcirculation, say, during optical capillaroscopy. However, many modern optical methods for blood flow measurements demand the reliable procedure for a fully automated detection of vessels and estimation of their diameter that is a challenging task. Specifically, if one measure the velocity of red blood cells by means of laser speckle imaging, then visual measurements become impossible, while the velocity-based estimation has their own limitations. One of promising approaches is based on fast switching of illumination type, but it drastically reduces the observation time, and hence, the achievable quality of images. In the present work we address this problem proposing an alternative method for the processing of noisy images of vascular structure, which extracts the mask denoting locations of vessels, based on the application of the continuous wavelet transform with the Morlet wavelet having small central frequencies. Such a method combines a reasonable accuracy with the possibility of fast direct implementation to images. Discussing the latter, we describe in details a new MATLAB program code realization for the CWT with the Morlet wavelet, which does not use loops completely replaced with element-by-element operations that drastically reduces the computation time.

Original languageEnglish
Title of host publicationSaratov Fall Meeting 2016
Subtitle of host publicationLaser Physics and Photonics XVII; and Computational Biophysics and Analysis of Biomedical Data III
EditorsVladimir L. Derbov, Dmitry E. Postnov
PublisherSPIE
ISBN (Electronic)9781510611191
DOIs
Publication statusPublished - 2017
Externally publishedYes
Event4th International Symposium on Optics and Biophotonics, SFM 2016 - Saratov, Russian Federation
Duration: 27 Sep 201630 Sep 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10337
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference4th International Symposium on Optics and Biophotonics, SFM 2016
Country/TerritoryRussian Federation
CitySaratov
Period27/09/1630/09/16

Keywords

  • continuous wavelet transform
  • contour detection
  • Morlet wavelet
  • Optics
  • vascular structure

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