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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
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" }