M?todo de avalia??o de algoritmos de detec??o e remo??o de sombra em imagens a?reas
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Tipo de documento: | Dissertação |
Idioma: | por |
Título da fonte: | Biblioteca Digital de Teses e Dissertações da PUC_RS |
Texto Completo: | http://tede2.pucrs.br/tede2/handle/tede/8145 |
Resumo: | Wide Area Motion Imagery (WAMI) systems acquire large area aerial images in real time to provide accurate situational awareness information from a region (BLASCH et al., 2014). This system is applied for urban aerial monitoring. Unfavorable environmental conditions, such as shadow regions, are factors that increase system complexity by compromising the effectiveness of tracking algorithms and human visual interpretation (PORTER; FRASER; HUSH, 2010). Several techniques of shadow removal in aerial images have been developed, however due to the characteristics of the shadow and aerial image, a specific method to evaluate and compare the removal is unknown. The main objective of this study is to develop a method to evaluate shadow removal algorithms in aerial images acquired by the WAMI system. This work proposes a radiometric approach modifying the illumination in a controlled environment, simulating an aerial scene, acquiring images with and without the presence of shadows. The image with shadows is processed by the evaluated shadow removal algorithm, with the ideal output being the shadow free image. Shadow detection is evaluated using the confusion matrix concept. Shadow removal is evaluated using the structural similarity index (SSIM). As a result the reduced scale aerial scene model is presented to generate shadow and freeshadow images and the evaluation of 3 shadow removal methods using the data sets of images obtained from the scale model applying the methodology developed. |
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Azevedo, Dario Francisco Guimar?es dehttp://lattes.cnpq.br/9298232237219641http://lattes.cnpq.br/9097414150837956Doth, Ricardo Vinicius2018-06-18T12:58:59Z2018-03-27http://tede2.pucrs.br/tede2/handle/tede/8145Wide Area Motion Imagery (WAMI) systems acquire large area aerial images in real time to provide accurate situational awareness information from a region (BLASCH et al., 2014). This system is applied for urban aerial monitoring. Unfavorable environmental conditions, such as shadow regions, are factors that increase system complexity by compromising the effectiveness of tracking algorithms and human visual interpretation (PORTER; FRASER; HUSH, 2010). Several techniques of shadow removal in aerial images have been developed, however due to the characteristics of the shadow and aerial image, a specific method to evaluate and compare the removal is unknown. The main objective of this study is to develop a method to evaluate shadow removal algorithms in aerial images acquired by the WAMI system. This work proposes a radiometric approach modifying the illumination in a controlled environment, simulating an aerial scene, acquiring images with and without the presence of shadows. The image with shadows is processed by the evaluated shadow removal algorithm, with the ideal output being the shadow free image. Shadow detection is evaluated using the confusion matrix concept. Shadow removal is evaluated using the structural similarity index (SSIM). As a result the reduced scale aerial scene model is presented to generate shadow and freeshadow images and the evaluation of 3 shadow removal methods using the data sets of images obtained from the scale model applying the methodology developed.Sistemas WAMI (Wide Area Motion Imagery) adquirem imagens a?reas de grandes ?reas em tempo real para prover informa??es precisas de uma determinada regi?o (BLASCH et al., 2014). Este sistema ? aplicado para monitoramento a?reo urbano. Condi??es ambientais desfavor?veis, como ?reas sombreadas, s?o fatores que aumentam a complexidade do sistema comprometendo a efic?cia de algoritmos de rastreamento e a interpreta??o visual humana (PORTER; FRASER; HUSH, 2010). Diversas t?cnicas de remo??o de sombra em imagens a?reas foram desenvolvidas, no entanto devido ?s caracter?sticas da sombra e da imagem a?rea ? desconhecido um m?todo espec?fico para avaliar e comparar a remo??o de sombras em imagens a?reas. O objetivo principal deste estudo ? desenvolver um m?todo para avaliar algoritmos de remo??o de sombra em imagens a?reas adquiridas pelo sistema WAMI. Este trabalho prop?e uma abordagem radiom?trica modificando a ilumina??o em um ambiente controlado, simulando uma cena a?rea, adquirindo imagens com e sem sombras. A imagem com sombra ? processada pelo algoritmo de remo??o de sombra avaliado, sendo a imagem sem sombra o resultado ideal a ser alcan?ado. A detec??o de sombra ? avaliada utilizando o conceito de matriz de confus?o (error matrix). A remo??o de sombra ? avaliada utilizando o ?ndice de similaridade estrutural entre duas imagens (SSIM). Foram desenvolvidos o modelo de cena a?rea em escala reduzida para gerar imagens com e sem sombra e a avalia??o de 3 m?todos de remo??o de sombras utilizando os data sets de imagens obtidas do modelo em escala aplicando a metodologia descrita.Submitted by PPG Engenharia El?trica (engenharia.pg.eletrica@pucrs.br) on 2018-06-08T13:54:41Z No. of bitstreams: 1 RICARDO_VINICIUS_DOTH_DIS.pdf: 9281309 bytes, checksum: d26fbf7274d4c8eb7158a2d987437b1b (MD5)Approved for entry into archive by Sheila Dias (sheila.dias@pucrs.br) on 2018-06-18T12:49:23Z (GMT) No. of bitstreams: 1 RICARDO_VINICIUS_DOTH_DIS.pdf: 9281309 bytes, checksum: d26fbf7274d4c8eb7158a2d987437b1b (MD5)Made available in DSpace on 2018-06-18T12:58:59Z (GMT). No. of bitstreams: 1 RICARDO_VINICIUS_DOTH_DIS.pdf: 9281309 bytes, checksum: d26fbf7274d4c8eb7158a2d987437b1b (MD5) Previous issue date: 2018-03-27Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPESapplication/pdfhttp://tede2.pucrs.br:80/tede2/retrieve/172522/RICARDO_VINICIUS_DOTH_DIS.pdf.jpgporPontif?cia Universidade Cat?lica do Rio Grande do SulPrograma de P?s-Gradua??o em Engenharia El?tricaPUCRSBrasilEscola Polit?cnicaDetec??o de SombrasSistema de Imageamento de ?reas AmplasShadow RemovalShadow DetectionWide Area Motion ImageryRemo??o de SombrasENGENHARIASM?todo de avalia??o de algoritmos de detec??o e remo??o de sombra em imagens a?reasinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisTrabalho n?o apresenta restri??o para publica??o20766291890596454950050060045189710564848268252075167498588264571info:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da PUC_RSinstname:Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS)instacron:PUC_RSTHUMBNAILRICARDO_VINICIUS_DOTH_DIS.pdf.jpgRICARDO_VINICIUS_DOTH_DIS.pdf.jpgimage/jpeg5743http://tede2.pucrs.br/tede2/bitstream/tede/8145/4/RICARDO_VINICIUS_DOTH_DIS.pdf.jpgdec11ab7a8792e2d4e754bb4592acb65MD54TEXTRICARDO_VINICIUS_DOTH_DIS.pdf.txtRICARDO_VINICIUS_DOTH_DIS.pdf.txttext/plain142276http://tede2.pucrs.br/tede2/bitstream/tede/8145/3/RICARDO_VINICIUS_DOTH_DIS.pdf.txtd46c9bd146eb1e99917b4271d5b71919MD53ORIGINALRICARDO_VINICIUS_DOTH_DIS.pdfRICARDO_VINICIUS_DOTH_DIS.pdfapplication/pdf9281309http://tede2.pucrs.br/tede2/bitstream/tede/8145/2/RICARDO_VINICIUS_DOTH_DIS.pdfd26fbf7274d4c8eb7158a2d987437b1bMD52LICENSElicense.txtlicense.txttext/plain; charset=utf-8610http://tede2.pucrs.br/tede2/bitstream/tede/8145/1/license.txt5a9d6006225b368ef605ba16b4f6d1beMD51tede/81452018-06-18 12:01:19.547oai:tede2.pucrs.br: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Biblioteca Digital de Teses e Dissertaçõeshttp://tede2.pucrs.br/tede2/PRIhttps://tede2.pucrs.br/oai/requestbiblioteca.central@pucrs.br||opendoar:2018-06-18T15:01:19Biblioteca Digital de Teses e Dissertações da PUC_RS - Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS)false |
dc.title.por.fl_str_mv |
M?todo de avalia??o de algoritmos de detec??o e remo??o de sombra em imagens a?reas |
title |
M?todo de avalia??o de algoritmos de detec??o e remo??o de sombra em imagens a?reas |
spellingShingle |
M?todo de avalia??o de algoritmos de detec??o e remo??o de sombra em imagens a?reas Doth, Ricardo Vinicius Detec??o de Sombras Sistema de Imageamento de ?reas Amplas Shadow Removal Shadow Detection Wide Area Motion Imagery Remo??o de Sombras ENGENHARIAS |
title_short |
M?todo de avalia??o de algoritmos de detec??o e remo??o de sombra em imagens a?reas |
title_full |
M?todo de avalia??o de algoritmos de detec??o e remo??o de sombra em imagens a?reas |
title_fullStr |
M?todo de avalia??o de algoritmos de detec??o e remo??o de sombra em imagens a?reas |
title_full_unstemmed |
M?todo de avalia??o de algoritmos de detec??o e remo??o de sombra em imagens a?reas |
title_sort |
M?todo de avalia??o de algoritmos de detec??o e remo??o de sombra em imagens a?reas |
author |
Doth, Ricardo Vinicius |
author_facet |
Doth, Ricardo Vinicius |
author_role |
author |
dc.contributor.advisor1.fl_str_mv |
Azevedo, Dario Francisco Guimar?es de |
dc.contributor.advisor1Lattes.fl_str_mv |
http://lattes.cnpq.br/9298232237219641 |
dc.contributor.authorLattes.fl_str_mv |
http://lattes.cnpq.br/9097414150837956 |
dc.contributor.author.fl_str_mv |
Doth, Ricardo Vinicius |
contributor_str_mv |
Azevedo, Dario Francisco Guimar?es de |
dc.subject.por.fl_str_mv |
Detec??o de Sombras Sistema de Imageamento de ?reas Amplas Shadow Removal Shadow Detection Wide Area Motion Imagery |
topic |
Detec??o de Sombras Sistema de Imageamento de ?reas Amplas Shadow Removal Shadow Detection Wide Area Motion Imagery Remo??o de Sombras ENGENHARIAS |
dc.subject.eng.fl_str_mv |
Remo??o de Sombras |
dc.subject.cnpq.fl_str_mv |
ENGENHARIAS |
description |
Wide Area Motion Imagery (WAMI) systems acquire large area aerial images in real time to provide accurate situational awareness information from a region (BLASCH et al., 2014). This system is applied for urban aerial monitoring. Unfavorable environmental conditions, such as shadow regions, are factors that increase system complexity by compromising the effectiveness of tracking algorithms and human visual interpretation (PORTER; FRASER; HUSH, 2010). Several techniques of shadow removal in aerial images have been developed, however due to the characteristics of the shadow and aerial image, a specific method to evaluate and compare the removal is unknown. The main objective of this study is to develop a method to evaluate shadow removal algorithms in aerial images acquired by the WAMI system. This work proposes a radiometric approach modifying the illumination in a controlled environment, simulating an aerial scene, acquiring images with and without the presence of shadows. The image with shadows is processed by the evaluated shadow removal algorithm, with the ideal output being the shadow free image. Shadow detection is evaluated using the confusion matrix concept. Shadow removal is evaluated using the structural similarity index (SSIM). As a result the reduced scale aerial scene model is presented to generate shadow and freeshadow images and the evaluation of 3 shadow removal methods using the data sets of images obtained from the scale model applying the methodology developed. |
publishDate |
2018 |
dc.date.accessioned.fl_str_mv |
2018-06-18T12:58:59Z |
dc.date.issued.fl_str_mv |
2018-03-27 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
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masterThesis |
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publishedVersion |
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http://tede2.pucrs.br/tede2/handle/tede/8145 |
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http://tede2.pucrs.br/tede2/handle/tede/8145 |
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por |
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por |
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207662918905964549 |
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500 500 600 |
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4518971056484826825 |
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2075167498588264571 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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Pontif?cia Universidade Cat?lica do Rio Grande do Sul |
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Programa de P?s-Gradua??o em Engenharia El?trica |
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PUCRS |
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Escola Polit?cnica |
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Pontif?cia Universidade Cat?lica do Rio Grande do Sul |
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