Predição de sombras de edifícios sobre vias urbanas com base em modelos digitais de elevações e dados de imagens aéreas de alta resolução
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://ojs.c3sl.ufpr.br/ojs2/index.php/bcg/article/view/12563 http://hdl.handle.net/11449/6700 |
Resumo: | This 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. |
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Predição de sombras de edifícios sobre vias urbanas com base em modelos digitais de elevações e dados de imagens aéreas de alta resoluçãoPrediction of building shadows cast on urban roads based on digital elevation models and high resolution aerial imagery dataParallel ProjectionBuilding ShadowsSolar EphemerisAerial ImagesDigital Elevation ModelsAirborne Laser Scanning SystemsThis 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.Univ Estadual Paulista, FCT, Programa Posgrad Ciencias Cartograficas, São Paulo, SP, BrazilUniv Estadual Paulista, FCT, Dept Cartog, São Paulo, SP, BrazilUniv Estadual Paulista, FCT, Programa Posgrad Ciencias Cartograficas, São Paulo, SP, BrazilUniv Estadual Paulista, FCT, Dept Cartog, São Paulo, SP, BrazilUniversidade Federal do Paraná (UFPR), Centro PolitecnicoUniversidade Estadual Paulista (Unesp)Fazan, Antonio Juliano [UNESP]Dal Poz, Aluir Porfírio [UNESP]2014-05-20T13:22:42Z2014-05-20T13:22:42Z2008-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article350-369application/pdfhttp://ojs.c3sl.ufpr.br/ojs2/index.php/bcg/article/view/12563Boletim de Ciências Geodesicas. Curitiba Pr: Universidade Federal do Paraná (UFPR), Centro Politecnico, v. 14, n. 3, p. 350-369, 2008.1413-4853http://hdl.handle.net/11449/6700WOS:000260674300004WOS000260674300004.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporBoletim de Ciências Geodésicas0,188info:eu-repo/semantics/openAccess2024-06-18T15:01:52Zoai:repositorio.unesp.br:11449/6700Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-06-18T15:01:52Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Predição de sombras de edifícios sobre vias urbanas com base em modelos digitais de elevações e dados de imagens aéreas de alta resolução Prediction of building shadows cast on urban roads based on digital elevation models and high resolution aerial imagery data |
title |
Predição de sombras de edifícios sobre vias urbanas com base em modelos digitais de elevações e dados de imagens aéreas de alta resolução |
spellingShingle |
Predição de sombras de edifícios sobre vias urbanas com base em modelos digitais de elevações e dados de imagens aéreas de alta resolução Fazan, Antonio Juliano [UNESP] Parallel Projection Building Shadows Solar Ephemeris Aerial Images Digital Elevation Models Airborne Laser Scanning Systems |
title_short |
Predição de sombras de edifícios sobre vias urbanas com base em modelos digitais de elevações e dados de imagens aéreas de alta resolução |
title_full |
Predição de sombras de edifícios sobre vias urbanas com base em modelos digitais de elevações e dados de imagens aéreas de alta resolução |
title_fullStr |
Predição de sombras de edifícios sobre vias urbanas com base em modelos digitais de elevações e dados de imagens aéreas de alta resolução |
title_full_unstemmed |
Predição de sombras de edifícios sobre vias urbanas com base em modelos digitais de elevações e dados de imagens aéreas de alta resolução |
title_sort |
Predição de sombras de edifícios sobre vias urbanas com base em modelos digitais de elevações e dados de imagens aéreas de alta resolução |
author |
Fazan, Antonio Juliano [UNESP] |
author_facet |
Fazan, Antonio Juliano [UNESP] Dal Poz, Aluir Porfírio [UNESP] |
author_role |
author |
author2 |
Dal Poz, Aluir Porfírio [UNESP] |
author2_role |
author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Fazan, Antonio Juliano [UNESP] Dal Poz, Aluir Porfírio [UNESP] |
dc.subject.por.fl_str_mv |
Parallel Projection Building Shadows Solar Ephemeris Aerial Images Digital Elevation Models Airborne Laser Scanning Systems |
topic |
Parallel Projection Building Shadows Solar Ephemeris Aerial Images Digital Elevation Models Airborne Laser Scanning Systems |
description |
This 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. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-01-01 2014-05-20T13:22:42Z 2014-05-20T13:22:42Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://ojs.c3sl.ufpr.br/ojs2/index.php/bcg/article/view/12563 Boletim de Ciências Geodesicas. Curitiba Pr: Universidade Federal do Paraná (UFPR), Centro Politecnico, v. 14, n. 3, p. 350-369, 2008. 1413-4853 http://hdl.handle.net/11449/6700 WOS:000260674300004 WOS000260674300004.pdf |
url |
http://ojs.c3sl.ufpr.br/ojs2/index.php/bcg/article/view/12563 http://hdl.handle.net/11449/6700 |
identifier_str_mv |
Boletim de Ciências Geodesicas. Curitiba Pr: Universidade Federal do Paraná (UFPR), Centro Politecnico, v. 14, n. 3, p. 350-369, 2008. 1413-4853 WOS:000260674300004 WOS000260674300004.pdf |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Boletim de Ciências Geodésicas 0,188 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
350-369 application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal do Paraná (UFPR), Centro Politecnico |
publisher.none.fl_str_mv |
Universidade Federal do Paraná (UFPR), Centro Politecnico |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1803045492590903296 |