Extração semi-automática de rodovia baseada em um par estéreo de imagens aéreas e em otimização por programação dinâmica no espaço-objeto
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Data
2010-01-01
Autores
Dal Poz, Aluir Porfírio [UNESP]
Gallis, Rodrigo de Araujo
Custodio da Silva, Joao Fernando [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal do Paraná (UFPR), Centro Politecnico
Resumo
This article proposes a method for 3D road extraction from a stereopair of aerial images. The dynamic programming (DP) algorithm is used to carry out the optimization process in the object-space, instead of usually doing it in the image-space such as the DP traditional methodologies. This means that road centerlines are directly traced in the object-space, implying that a mathematical relationship is necessary to connect road points in object and image-space. This allows the integration of radiometric information from images into the associate mathematical road model. As the approach depends on an initial approximation of each road, it is necessary a few seed points to coarsely describe the road. Usually, the proposed method allows good results to be obtained, but large anomalies along the road can disturb its performance. Therefore, the method can be used for practical application, although it is expected some kind of local manual edition of the extracted road centerline.
Descrição
Palavras-chave
Dynamic programming, road model, feature extraction, road extraction, aerial images
Como citar
Boletim de Ciências Geodesicas. Curitiba Pr: Universidade Federal do Paraná (UFPR), Centro Politecnico, v. 16, n. 2, p. 189-209, 2010.