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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

EXPERIMENTAL ASSESSMENT OF TECHNIQUES FOR FISHEYE CAMERA CALIBRATION

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Autor(es):
Marcato Junior, Jose [1] ; Antunes de Moraes, Marcus Vinicius [2] ; Garcia Tommaselli, Antonio Maria [2]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] UFMS Univ Fed Mato Grosso do Sul, Fac Engn Arquitetura & Urbanismo & Geog, Campus Univ, F-79070900 Campo Grande, MS - France
[2] Univ Estadual Paulista, UNESP, Dept Cartog, Fac Ciencias & Tecnol, BR-19060900 Presidente Prudente, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Bol. Ciênc. Geod.; v. 21, n. 3, p. 637-651, JUL-SEP 2015.
Citações Web of Science: 9
Resumo

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. (AU)

Processo FAPESP: 10/16439-3 - Modelagem fotogramétrica e calibração de um sistema de visão omnidirecional
Beneficiário:José Marcato Junior
Linha de fomento: Bolsas no Brasil - Doutorado