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://hdl.handle.net/11449/225422 |
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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Repositório Institucional da UNESP |
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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 dataAerial imagesAirborne laser scanning systemsBuilding shadowsDigital elevation modelsParallel projectionSolar ephemerisThis 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.Programa de Pós-Graduação em Ciências Cartográficas Universidade Estadual Paulista - UNESP Faculdade de Ciências e Tecnologia - FCT, Campus de Presidente Prudente, São Paulo, SPDepartamento de Cartografia Universidade Estadual Paulista - UNESP Faculdade de Ciências e Tecnologia - FCT, Campus de Presidente Prudente, São Paulo, SPPrograma de Pós-Graduação em Ciências Cartográficas Universidade Estadual Paulista - UNESP Faculdade de Ciências e Tecnologia - FCT, Campus de Presidente Prudente, São Paulo, SPDepartamento de Cartografia Universidade Estadual Paulista - UNESP Faculdade de Ciências e Tecnologia - FCT, Campus de Presidente Prudente, São Paulo, SPUniversidade Estadual Paulista (UNESP)Fazan, Antonio Juliano [UNESP]Dal Poz, Aluir Porfírio [UNESP]2022-04-28T20:49:16Z2022-04-28T20:49:16Z2008-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article350-369Boletim de Ciencias Geodesicas, v. 14, n. 3, p. 350-369, 2008.1413-4853http://hdl.handle.net/11449/2254222-s2.0-61349139459Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporBoletim de Ciencias Geodesicasinfo:eu-repo/semantics/openAccess2024-06-18T15:01:39Zoai:repositorio.unesp.br:11449/225422Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-06-18T15:01:39Repositório 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] Aerial images Airborne laser scanning systems Building shadows Digital elevation models Parallel projection Solar ephemeris |
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 |
Aerial images Airborne laser scanning systems Building shadows Digital elevation models Parallel projection Solar ephemeris |
topic |
Aerial images Airborne laser scanning systems Building shadows Digital elevation models Parallel projection Solar ephemeris |
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 |
2008-12-01 2022-04-28T20:49:16Z 2022-04-28T20:49:16Z |
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 |
Boletim de Ciencias Geodesicas, v. 14, n. 3, p. 350-369, 2008. 1413-4853 http://hdl.handle.net/11449/225422 2-s2.0-61349139459 |
identifier_str_mv |
Boletim de Ciencias Geodesicas, v. 14, n. 3, p. 350-369, 2008. 1413-4853 2-s2.0-61349139459 |
url |
http://hdl.handle.net/11449/225422 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Boletim de Ciencias Geodesicas |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
350-369 |
dc.source.none.fl_str_mv |
Scopus 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 |
|
_version_ |
1803045408440582144 |