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Shadow detection improvement using spectral indices and morphological operators in Urban Areas in high resolution images
(2015-01-01)
While high-resolution remote sensing images have increased application possibilities for urban studies, the large number of shadow areas has created challenges to processing and extracting information from these images. ...
Shadow detection using object area-based and morphological filtering for very high-resolution satellite imagery of urban areas
(Society of Photo-optical Instrumentation Engineers, 2019-08-09)
The presence of shadows in remote sensing images leads to misinterpretation of objects and a wrong discrimination of the targets of interest, therefore, limiting the use of several imaging applications. An automatic ...
DESHADOWING OF HIGH SPATIAL RESOLUTION IMAGERY APPLIED TO URBAN AREA DETECTION
(Univ Federal Parana, Centro Politecnico, 2019-01-01)
Different built-up structures usually lead to large regions covered by shadows, causing partial or total loss of information present in urban environments. In order to mitigate the presence of shadows while improving the ...
Morfologia matemática aplicada à detecção de sombras e nuvens em imagens de alta resolução
(2008-04-01)
The spatial resolution improvement of orbital sensors has broadened considerably the applicability of their images in solving urban areas problems. But as the spatial resolution improves, the shadows become even a more ...
Shadow detection in hyperspectral images acquired by uav
(2019-06-04)
Shadows are common in any kind of remote sensing images. Unmanned Aerial Vehicle – UAV with a light camera attached can acquire images illuminated either by direct sunlight or by diffuse light under clouds. Indeed, ...
Detecção automática de sombras em imagens aéreas e terrestres
(2017-01-01)
Shadows exist in almost all aerial and outdoor images, and they can be useful for estimating Sun position estimation or measuring object size. On the other hand, they represent a problem in processes such as object ...
Morfologia matemática aplicada à detecção de sombras e nuvens em imagens de alta resolução
(Universidade Federal do Paraná (UFPR), Centro Politecnico, 2008-01-01)
The spatial resolution improvement of orbital sensors has broadened considerably the applicability of their images in solving urban areas problems. But as the spatial resolution improves, the shadows become even a more ...
Morfologia matemática aplicada à detecção de sombras e nuvens em imagens de alta resolução
(Universidade Federal do Paraná (UFPR), Centro Politecnico, 2014)
Reasoning about shadows in a mobile robot environment
(2013)
This paper describes a logic-based formalism for qualitative spatial reasoning with cast shadows (Perceptual Qualitative Relations on Shadows, or PQRS) and presents results of a mobile robot qualitative self-localisation ...
Método monoscópico para a determinação automática da altura de edifícios em fotografias aéreas
(Universidade Federal do Paraná (UFPR), Centro Politecnico, 2008-01-01)
This paper proposes a monoscopic method for automatic determination of building's heights in digital photographs areas, based on radial displacement of points in the plan image and geometry at the time the photo is obtained. ...