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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/6700
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dc.contributor.authorFazan, Antonio Juliano-
dc.contributor.authorDal Poz, Aluir Porfírio-
dc.date.accessioned2014-05-20T13:22:42Z-
dc.date.available2014-05-20T13:22:42Z-
dc.date.issued2008-01-01-
dc.identifierhttp://ojs.c3sl.ufpr.br/ojs2/index.php/bcg/article/view/12563-
dc.identifier.citationBoletim de Ciências Geodesicas. Curitiba Pr: Universidade Federal do Paraná (UFPR), Centro Politecnico, v. 14, n. 3, p. 350-369, 2008.-
dc.identifier.issn1413-4853-
dc.identifier.urihttp://hdl.handle.net/11449/6700-
dc.description.abstractThis research presents a methodology for prediction of building shadows cast on urban roads existing on high-resolution aerial imagery. Shadow elements can be used in the modeling of contextual information, whose use has become more and more common in image analysis complex processes. The proposed methodology consists in three sequential steps. First, the building roof contours are manually extracted from an intensity image generated by the transformation of a digital elevation model (DEM) obtained from airborne laser scanning data. In similarly, the roadside contours are extracted, now from the radiometric information of the laser scanning data. Second, the roof contour polygons are projected onto the adjacent roads by using the parallel projection straight lines, whose directions are computed from the solar ephemeris, which depends on the aerial image acquisition time. Finally, parts of shadow polygons that are free from building perspective obstructions are determined, given rise to new shadow polygons. The results obtained in the experimental evaluation of the methodology showed that the method works properly, since it allowed the prediction of shadow in high-resolution imagery with high accuracy and reliability.en
dc.format.extent350-369-
dc.language.isopor-
dc.publisherUniversidade Federal do Paraná (UFPR), Centro Politecnico-
dc.sourceWeb of Science-
dc.subjectParallel Projectionen
dc.subjectBuilding Shadowsen
dc.subjectSolar Ephemerisen
dc.subjectAerial Imagesen
dc.subjectDigital Elevation Modelsen
dc.subjectAirborne Laser Scanning Systemsen
dc.titlePredição de sombras de edifícios sobre vias urbanas com base em modelos digitais de elevações e dados de imagens aéreas de alta resoluçãopt
dc.title.alternativePrediction of building shadows cast on urban roads based on digital elevation models and high resolution aerial imagery dataen
dc.typeoutro-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationUniv Estadual Paulista, FCT, Programa Posgrad Ciencias Cartograficas, São Paulo, SP, Brazil-
dc.description.affiliationUniv Estadual Paulista, FCT, Dept Cartog, São Paulo, SP, Brazil-
dc.description.affiliationUnespUniv Estadual Paulista, FCT, Programa Posgrad Ciencias Cartograficas, São Paulo, SP, Brazil-
dc.description.affiliationUnespUniv Estadual Paulista, FCT, Dept Cartog, São Paulo, SP, Brazil-
dc.identifier.wosWOS:000260674300004-
dc.rights.accessRightsAcesso aberto-
dc.identifier.fileWOS000260674300004.pdf-
dc.relation.ispartofBoletim de Ciências Geodésicas-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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