Blind restoration of retinal images degraded by space-variant blur with adaptive blur estimation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985556%3A_____%2F13%3A00422848" target="_blank" >RIV/67985556:_____/13:00422848 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1117/12.2025134" target="_blank" >http://dx.doi.org/10.1117/12.2025134</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2025134" target="_blank" >10.1117/12.2025134</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Blind restoration of retinal images degraded by space-variant blur with adaptive blur estimation

Popis výsledku v původním jazyce

Retinal images are often degraded with a blur that varies across the eld view. Because traditional deblurring algorithms assume the blur to be space-invariant they typically fail in the presence of space-variant blur. In this work we consider the blur tobe both unknown and space-variant. To carry out the restoration, we assume that in small regions the space-variant blur can be approximated by a space-invariant point-spread function (PSF). However, instead of deblurring the image on a per-patch basis,we extend individual PSFs by linear interpolation and perform a global restoration. Because the blind estimation of local PSFs may fail we propose a strategy for the identication of valid local PSFs and perform interpolation to obtain the space-variant PSF. The method was tested on articial and real degraded retinal images. Results show signicant improvement in the visibility of subtle details like small blood vessels.

Název v anglickém jazyce

Blind restoration of retinal images degraded by space-variant blur with adaptive blur estimation

Popis výsledku anglicky

Retinal images are often degraded with a blur that varies across the eld view. Because traditional deblurring algorithms assume the blur to be space-invariant they typically fail in the presence of space-variant blur. In this work we consider the blur tobe both unknown and space-variant. To carry out the restoration, we assume that in small regions the space-variant blur can be approximated by a space-invariant point-spread function (PSF). However, instead of deblurring the image on a per-patch basis,we extend individual PSFs by linear interpolation and perform a global restoration. Because the blind estimation of local PSFs may fail we propose a strategy for the identication of valid local PSFs and perform interpolation to obtain the space-variant PSF. The method was tested on articial and real degraded retinal images. Results show signicant improvement in the visibility of subtle details like small blood vessels.

Druh

D - Stať ve sborníku

CEP obor

JD - Využití počítačů, robotika a její aplikace

OECD FORD obor

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Projekt

<a href="/cs/project/GA13-29225S" target="_blank" >GA13-29225S: Slepá dekonvoluce obrazu v limitních podmínkách</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings ot the 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications

ISBN

978-0-8194-9601-0

ISSN

0277-786X

e-ISSN

—

Počet stran výsledku

8

Strana od-do

"8785D1 "-" 1-8785D1 - 8"

Název nakladatele

SPIE

Místo vydání

Bellingham

Místo konání akce

Porto

Datum konání akce

22. 7. 2013

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000328616100190