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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.)

Calibration of a catadioptric omnidirectional vision system with conic mirror

Texto completo
Marcato Junior, J. [1] ; Tommaselli, A. M. G. [2] ; Moraes, M. V. A. [2]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] UFMS Univ Fed Mato Grosso Sul, FAENG, Campus Univ, BR-79070900 Campo Grande - Brazil
[2] UNESP Univ Estadual Paulista, Dept Cartog, Rua Roberto Simonsen 305, BR-19060900 Presidente Prudente - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Citações Web of Science: 4

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 in Photogrammetric applications, it is necessary to model and calibrate these systems. The major contribution of this paper relates to the rigorous geometric modeling and calibration of a catadioptric, omnidirectional vision system that is composed of a wide-angle lens camera and a conic mirror. The indirect orientation of the omnidirectional images can also be estimated using this rigorous mathematical model. When calibrating the system, which is composed of a wide-angle camera and a conic mirror, misalignment of the conical mirror axis with respect to the camera's optical axis is a critical problem that must be considered in mathematical models. The interior calibration technique developed in this paper encompasses the following steps: wide-angle camera calibration; conic mirror modeling; and estimation of the transformation parameters between the camera and conic mirror reference systems. The main advantage of the developed technique is that it does not require accurate physical alignment between the camera and conic mirror axis. The exterior orientation is based on the properties of the conic mirror reflection. Experiments were conducted with images collected from a calibration field, and the results verified that the catadioptric omnidirectional system allows for the generation of ground coordinates with high geometric quality, provided that rigorous photogrammetric processes are applied. (C) 2015 International Society for Photogrammetry and Remote Sensing, Inc. (ISPRS). Published by Elsevier B.V. All rights reserved. (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