Publication detail

Registration of retinal sequences from new video-ophthalmoscopic camera

KOLÁŘ, R. TORNOW, R. ODSTRČILÍK, J. LIBERDOVÁ, I.

Original Title

Registration of retinal sequences from new video-ophthalmoscopic camera

Type

journal article in Web of Science

Language

English

Original Abstract

Analysis of fast temporal changes on retinas has become an important part of diagnostic video-ophthalmology. It enables investigation of the hemodynamic processes in retinal tissue, e.g. blood-vessel diameter changes as a result of blood-pressure variation, spontaneous venous pulsation influenced by intracranial-intraocular pressure difference, blood-volume changes as a result of changes in light reflection from retinal tissue, and blood flow using laser speckle contrast imaging. For such applications, image registration of the recorded sequence must be performed. Here we use a new non-mydriatic video-ophthalmoscope for simple and fast acquisition of low SNR retinal sequences. We introduce a novel, two-step approach for fast image registration. The phase correlation in the first stage removes large eye movements. Lucas-Kanade tracking in the second stage removes small eye movements. We propose robust adaptive selection of the tracking points, which is the most important part of tracking-based approaches. We also describe a method for quantitative evaluation of the registration results, based on vascular tree intensity profiles.

Keywords

Retinal imaging; Video-ophthalmoscopy; Image registration; Tracking

Authors

KOLÁŘ, R.; TORNOW, R.; ODSTRČILÍK, J.; LIBERDOVÁ, I.

Released

20. 5. 2016

Publisher

BioMed Central

ISBN

1475-925X

Periodical

BIOMED ENG ONLINE

Year of study

15

Number

57

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1

Pages to

17

Pages count

17

URL

http://biomedical-engineering-online.biomedcentral.com/articles/10.1186/s12938-016-0191-0

Full text in the Digital Library

http://hdl.handle.net/11012/60633

BibTex

@article{BUT125580,
  author="Radim {Kolář} and Ralf-Peter {Tornow} and Jan {Odstrčilík} and Ivana {Labounková}",
  title="Registration of retinal sequences from new video-ophthalmoscopic camera",
  journal="BIOMED ENG ONLINE",
  year="2016",
  volume="15",
  number="57",
  pages="1--17",
  doi="10.1186/s12938-016-0191-0",
  issn="1475-925X",
  url="http://biomedical-engineering-online.biomedcentral.com/articles/10.1186/s12938-016-0191-0"
}