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Geometric model and assessment of a dual-fisheye imaging system
(2018-06-01)
This paper presents a technique for the calibration of a 360° dual imaging system (Ricoh Theta S) composed of two cameras with fisheye lenses specially mounted in a common structure. The experiments are based on calibration ...
Calibration of panoramic cameras with coded targets and a 3D calibration field
(2014-01-01)
The aim of this paper is to present results achieved with a 3D terrestrial calibration field, designed for calibrating digital cameras and omnidirectional sensors. This terrestrial calibration field is composed of 139 ARUCO ...
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 ...
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 ...
3D Reconstruction of Citrus Trees Using an Omnidirectional Optical System
(2020-03-01)
This paper presents a feasibility study on the use of omnidirectional systems for 3D modelling of agricultural crops, aiming a systematic monitoring. Omnidirectional systems with multiple sensors have been widely used in ...
3D RECONSTRUCTION OF CITRUS TREES USING AN OMNIDIRECTIONAL OPTICAL SYSTEM
(Ieee, 2020-01-01)
This paper presents a feasibility study on the use of omnidirectional systems for 3D modelling of agricultural crops, aiming a systematic monitoring. Omnidirectional systems with multiple sensors have been widely used in ...
Geometric model of a dual-fisheye system composed of hyper-hemispherical lenses
(Universidade Estadual Paulista (Unesp), 2020-03-03)
A combinação de duas lentes com FOV hiper-hemisférico em posição opostas pode gerar um sistema omnidirecional (FOV 360°) leve, compacto e de baixo custo, como Ricoh Theta S e GoPro Fusion. Entretanto, apenas algumas técnicas ...
Estimacion del indice de area foliar a traves de fotografia hemisferica y deshoje manual en manzanos y cerezosEstimation of leaf area index through hemispherical photography and leaf collection in apple and cherry trees
(Universidad de Talca (Chile). Facultad de Ciencias Agrarias, 2005)
Modeling Hyperhemispherical Points and Calibrating a Dual-Fish-Eye System for Close-Range Applications
(Amer Soc Photogrammetry, 2021-05-01)
Omnidirectional systems composed of two hyperhemispherical lenses (dual-fish-eye systems) are gaining popularity, but only a few works have studied suitable models for hyperhemispherical lenses and dual-fish-eye calibration. ...
USING VERTICAL PANORAMIC IMAGES TO RECORD A HISTORIC CEMETERY
(Copernicus Gesellschaft Mbh, 2013-01-01)
In 1919, during colonization of the West Region of Sao Paulo State, Brazil, the Ogassawara family built a cemetery and a school with donations received from the newspaper Osaka Mainichi Shimbum, in Osaka, Japan. The cemetery ...