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Mostrando ítems 11-20 de 20
Bundle Adjustment of a Time-Sequential Spectral Camera Using Polynomial Models
(2019-11-01)
Lightweight hyperspectral cameras based on frame geometry have been used for several applications in unmanned aerial vehicles (UAVs). The camera used in this investigation is based on a tunable Fabry-Pérot interferometer ...
Automatic Orientation of Multi-Scale Terrestrial Images for 3D Reconstruction
(Mdpi Ag, 2014-04-01)
Image orientation requires ground control as a source of information for both indirect estimation and quality assessment to guarantee the accuracy of the photogrammetric processes. However, the orientation still depends ...
Orientação indireta de imagens digitais usando telhados de duas águas como apoio de campo
(Universidade Federal de Uberlândia (UFU), 2012-03-01)
Este trabalho apresenta um método para orientação indireta de imagens digitais usando telhado de duas águas como apoio de campo. Edificações com telhados de duas águas são visualmente selecionados pelo operador na imagem ...
Extração de feições retas com precisão subpixel: estudo comparativo entre três métodos
(Universidade Federal do Paraná (UFPR), Centro Politecnico, 2008-01-01)
In the fields of Machine Vision and Photogrammetry, extracted straight lines from digital images can be used either as vector elements of a digital representation or as control entities that allow the determination of the ...
Avaliação experimental de técnicas de calibração de câmaras com objetiva olho de peixe
(2015-01-01)
Fisheye lens cameras enable to increase the Field of View (FOV), and consequently they have been largely used in several applications like robotics. The use of this type of cameras in close-range Photogrammetry for high ...
Extração de feições retas com precisão subpixel: Estudo comparativo entre três métodos
(2008-01-01)
In the fields of Machine Vision and Photogrammetry, extracted straight lines from digital images can be used either as vector elements of a digital representation or as control entities that allow the determination of the ...
Calibration of a catadioptric omnidirectional vision system with conic mirror
(2016-03-01)
Omnidirectional vision systems that enable 360° imaging have been widely used in several research areas, including close-range photogrammetry, which allows the accurate 3D measurement of objects. To achieve accurate results ...
Locating control points in aerial images with a multi-scale approach based on terrestrial image patches
(Wiley-Blackwell, 2015-03-01)
The objective of the proposed approach is to locate and measure ground control points in aerial images when large image search spaces are defined due to the use of inaccurate initial exterior orientation parameters, such ...
A Fisheye image matching method boosted by recursive search space for close range photogrammetry
(2019-06-01)
Close range photogrammetry (CRP) with large field-of-view images has become widespread in recent years, especially in terrestrial mobile mapping systems (TMMS). However, feature-based matching (FBM) with omnidirectional ...
A Markov-Random-Field Approach for Extracting Straight-Line Segments of Roofs From High-Resolution Aerial Images
(Ieee-inst Electrical Electronics Engineers Inc, 2016-12-01)
This paper proposes a method for extracting groups of straight lines that represent roof boundary sides and roof ridgelines from high-resolution aerial images using corresponding airborne laser scanner (ALS) roof polyhedrons ...