Beyond the current noise limit in imaging through turbulent medium

2015
journal article
article
5
cris.lastimport.wos2024-04-09T19:38:19Z
dc.abstract.enShift-and-add is an approach employed to mitigate the phenomenon of resolution degradation in images acquired through a turbulent medium. Using this technique, a large number of consecutive short exposures is registered below the coherence time of the atmosphere or other blurring medium. The acquired images are shifted to the position of the brightest speckle and stacked together to obtain high resolution and high signal-to-noise frame. In this Letter, we present a highly efficient method for determination of frame shifts, even if in a single frame the object cannot be distinguished from the background noise. The technique utilizes our custom genetic algorithm, which iteratively evolves a set of image shifts. We used the maximal energy of stacked images as an objective function for shifts estimation and validate the efficiency of the method on simulated and real images of simple and complex sources. Obtained results confirmed that our proposed method allows for the recovery of spatial distribution of objects even only 2% brighter than their background. The presented approach extends significantly current limits of image reconstruction with the use of shift-and-add method. The applications of our algorithm include both the optical and the infrared imaging. Our method may be also employed as a digital image stabilizer in extremely low light level conditions in professional and consumer applications.pl
dc.affiliationWydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomicznepl
dc.contributor.authorPopowicz, Adampl
dc.contributor.authorKurek, Aleksander - 221301 pl
dc.contributor.authorPollo, Agnieszka - 131503 pl
dc.contributor.authorSmolka, Bogdanpl
dc.date.accessioned2015-11-19T12:10:27Z
dc.date.available2015-11-19T12:10:27Z
dc.date.issued2015pl
dc.description.number10pl
dc.description.physical2181-2184pl
dc.description.volume40pl
dc.identifier.doi10.1364/OL.40.002181pl
dc.identifier.eissn1071-2763pl
dc.identifier.eissn1539-4794pl
dc.identifier.issn0146-9592pl
dc.identifier.projectPOIG.02.03.01-24-099/13pl
dc.identifier.projectDean of the Faculty of Physics, Astronomy and Applied Computer Sciences of the Jagiellonian University, decision no. 7150/E-338/M/2014pl
dc.identifier.projectThe National Science Center grant UMO-2012/ 07/B/ST9/04425pl
dc.identifier.urihttp://ruj.uj.edu.pl/xmlui/handle/item/16927
dc.languageengpl
dc.language.containerengpl
dc.rightsDodaję tylko opis bibliograficzny*
dc.rights.licencebez licencji
dc.rights.uri*
dc.subject.endigital image processingpl
dc.subject.enimage reconstruction techniquespl
dc.subject.enturbulencepl
dc.subtypeArticlepl
dc.titleBeyond the current noise limit in imaging through turbulent mediumpl
dc.title.journalOptics Letterspl
dc.typeJournalArticlepl
dspace.entity.typePublication
cris.lastimport.wos
2024-04-09T19:38:19Z
dc.abstract.enpl
Shift-and-add is an approach employed to mitigate the phenomenon of resolution degradation in images acquired through a turbulent medium. Using this technique, a large number of consecutive short exposures is registered below the coherence time of the atmosphere or other blurring medium. The acquired images are shifted to the position of the brightest speckle and stacked together to obtain high resolution and high signal-to-noise frame. In this Letter, we present a highly efficient method for determination of frame shifts, even if in a single frame the object cannot be distinguished from the background noise. The technique utilizes our custom genetic algorithm, which iteratively evolves a set of image shifts. We used the maximal energy of stacked images as an objective function for shifts estimation and validate the efficiency of the method on simulated and real images of simple and complex sources. Obtained results confirmed that our proposed method allows for the recovery of spatial distribution of objects even only 2% brighter than their background. The presented approach extends significantly current limits of image reconstruction with the use of shift-and-add method. The applications of our algorithm include both the optical and the infrared imaging. Our method may be also employed as a digital image stabilizer in extremely low light level conditions in professional and consumer applications.
dc.affiliationpl
Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut – Obserwatorium Astronomiczne
dc.contributor.authorpl
Popowicz, Adam
dc.contributor.authorpl
Kurek, Aleksander - 221301
dc.contributor.authorpl
Pollo, Agnieszka - 131503
dc.contributor.authorpl
Smolka, Bogdan
dc.date.accessioned
2015-11-19T12:10:27Z
dc.date.available
2015-11-19T12:10:27Z
dc.date.issuedpl
2015
dc.description.numberpl
10
dc.description.physicalpl
2181-2184
dc.description.volumepl
40
dc.identifier.doipl
10.1364/OL.40.002181
dc.identifier.eissnpl
1071-2763
dc.identifier.eissnpl
1539-4794
dc.identifier.issnpl
0146-9592
dc.identifier.projectpl
POIG.02.03.01-24-099/13
dc.identifier.projectpl
Dean of the Faculty of Physics, Astronomy and Applied Computer Sciences of the Jagiellonian University, decision no. 7150/E-338/M/2014
dc.identifier.projectpl
The National Science Center grant UMO-2012/ 07/B/ST9/04425
dc.identifier.uri
http://ruj.uj.edu.pl/xmlui/handle/item/16927
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights*
Dodaję tylko opis bibliograficzny
dc.rights.licence
bez licencji
dc.rights.uri*
dc.subject.enpl
digital image processing
dc.subject.enpl
image reconstruction techniques
dc.subject.enpl
turbulence
dc.subtypepl
Article
dc.titlepl
Beyond the current noise limit in imaging through turbulent medium
dc.title.journalpl
Optics Letters
dc.typepl
JournalArticle
dspace.entity.type
Publication

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