Autor(es): Marcato Junior, José ; de Moraes, Marcus Vinícius Antunes [UNESP] ; Tommaselli, Antonio Maria Garcia [UNESP]
Data: 2018
Identificador Persistente: http://hdl.handle.net/11449/177502
Origem: Oasisbr
Assunto(s): Camera calibration; Digital cameras; Omnidirectional systems; Photogrammetry; Camera calibration; Camera calibration; Digital cameras; Digital cameras; Omnidirectional systems; Omnidirectional systems; Photogrammetry; Photogrammetry
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
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 accuracy applications, requires rigorous calibration. The main aim of this work is to present the calibration results of a Fuji Finepix S3PRO camera with Samyang 8mm fisheye lens using rigorous mathematical models. Mathematical models based on Perspective, Stereo-graphic, Equi-distant, Orthogonal and Equi-solid-angle projections were implemented and used in the experiments. The fisheye lenses are generally designed following one of the last four models, and Bower-Samyang 8mm lens is based on Stereo-graphic projection. These models were used in combination with symmetric radial, decentering and affinity distortion models. Experiments were performed to verify which set of IOPs (Interior Orientation Parameters) presented better results to describe the camera inner geometry. Collinearity mathematical model, which is based on perspective projection, presented the less accurate results, which was expected because fisheye lenses are not designed following the perspective projection. Stereo-graphic, Equi-distant, Orthogonal and Equi-solid-angle projections presented similar results even considering that Bower-Samyang fisheye lens was built based on Stereo-graphic projection. The experimental results also demonstrated a small correlation between IOPs and EOPs (Exterior Orientation Parameters) for Bower-Samyang lens.
Arquitetura e Urbanismo e Geografia, UFMS – Universidade Federal de Mato Grosso do Sul, Campus Universitário
UNESP – Univ Estadual Paulista, Rua Roberto Simonsen, 305
UNESP – Univ Estadual Paulista, Rua Roberto Simonsen, 305
FAPESP: 2010/16439-3
CNPq: 305111/2010-8
CNPq: 456149/2014-7
CNPq: 477738/2009-5
