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Implementation of an image based focusing algorithm for non-mydriatic retinal imaging

dc.contributor.editorMarrugo A.G.
dc.creatorMarrugo A.G.
dc.creatorMillan M.S.
dc.creatorAbril H.C.
dc.date.accessioned2020-03-26T16:32:51Z
dc.date.available2020-03-26T16:32:51Z
dc.date.issued2014
dc.identifier.citation2014 3rd International Congress of Engineering Mechatronics and Automation, CIIMA 2014 - Conference Proceedings
dc.identifier.isbn9781479979325
dc.identifier.urihttps://hdl.handle.net/20.500.12585/9053
dc.description.abstractRetinal photography is important for the assessment of eye diseases. The task of fine focusing the image is demanding and lack of focus is often the cause of suboptimal photographs. The advent of digital cameras has provided the opportunity to automate the focusing process. In this work, we propose an auto-focus system for non-mydriatic retinal imaging. The core of the system is based on a robust image-based focus measure. The measure is basically a quantification of image anisotropy computed by means of the normalized discrete cosine transform. Additionally, we optimize the autofocusing method by evaluating different focus search strategies. Encouraging experimental results reveal that the method is able to identify the best focus reliably with optimal speed. © 2014 IEEE.eng
dc.description.sponsorshipUniversidad Tecnologica de Bolivar
dc.format.mediumRecurso electrónico
dc.format.mimetypeapplication/pdf
dc.language.isoeng
dc.publisherInstitute of Electrical and Electronics Engineers Inc.
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourcehttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84930999583&doi=10.1109%2fCIIMA.2014.6983425&partnerID=40&md5=639af962e61663e73fff0e34ba90531b
dc.sourceScopus2-s2.0-84930999583
dc.titleImplementation of an image based focusing algorithm for non-mydriatic retinal imaging
dcterms.bibliographicCitationBernardes, R., Serranho, P., Lobo, C., Digital ocular fundus imaging: A review (2011) Ophthalmologica, 226, pp. 161-181
dcterms.bibliographicCitationMarrugo, A.G., Millan, M.S., Retinal image analysis oriented to the clinical task (2014) Electronic Letters on Computer Vision and Image Analysis, 13, pp. 54-55
dcterms.bibliographicCitationMoscaritolo, M., Jampel, H., Knezevich, F., Zeimer, R., An image based auto-focusing algorithm for digital fundus photography (2009) Medical Imaging, IEEE Transactions on, 28, pp. 1703-1707
dcterms.bibliographicCitationMarrugo, A.G., Millan, M.S., Sorel, M., Sroubek, F., Restoration of retinal images with space-variant blur (2014) J. Biomed. Opt., 19, p. 016023
dcterms.bibliographicCitationMarrugo, A.G., Millan, M.S., Cristobal, G., Gabarda, S., Abril, H.C., Anisotropy-based robust focus measure for non-mydriatic retinal imaging (2012) J. Biomed. Opt., 17, p. 076021
dcterms.bibliographicCitationTsai, D.-C., Chen, H., Reciprocal focus profile (2012) Image Processing, IEEE Transactions on, 21, pp. 459-468
datacite.rightshttp://purl.org/coar/access_right/c_16ec
oaire.resourceTypehttp://purl.org/coar/resource_type/c_c94f
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
dc.source.event2014 3rd International Congress of Engineering Mechatronics and Automation, CIIMA 2014
dc.type.driverinfo:eu-repo/semantics/conferenceObject
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersion
dc.identifier.doi10.1109/CIIMA.2014.6983425
dc.subject.keywordsAutofocus
dc.subject.keywordsImage processing
dc.subject.keywordsNon-mydriatic
dc.subject.keywordsRetinal imaging
dc.subject.keywordsAlgorithms
dc.subject.keywordsDiscrete cosine transforms
dc.subject.keywordsImage processing
dc.subject.keywordsOphthalmology
dc.subject.keywordsPhotography
dc.subject.keywordsAuto-focus
dc.subject.keywordsAuto-focus system
dc.subject.keywordsAuto-focusing
dc.subject.keywordsFocusing algorithm
dc.subject.keywordsImage anisotropies
dc.subject.keywordsNon-mydriatic
dc.subject.keywordsRetinal imaging
dc.subject.keywordsSearch strategies
dc.subject.keywordsFocusing
dc.rights.accessRightsinfo:eu-repo/semantics/restrictedAccess
dc.rights.ccAtribución-NoComercial 4.0 Internacional
dc.identifier.instnameUniversidad Tecnológica de Bolívar
dc.identifier.reponameRepositorio UTB
dc.relation.conferencedate22 October 2014 through 24 October 2014
dc.type.spaConferencia
dc.identifier.orcid24329839300
dc.identifier.orcid7201466399
dc.identifier.orcid6603209063


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