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Robust Calibration of Cameras with Telephoto Lens Using Regularized Least Squares
Joint Authors
Huang, Xinyu
Zheng, Gaolin
Chen, Chung-Hao
Liang, Mingpei
Tokuta, Alade
Source
Mathematical Problems in Engineering
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-02-11
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Cameras with telephoto lens are usually used to recover details of an object that is either small or located far away from the cameras.
However, the calibration of this kind of cameras is not as accurate as the one of cameras with short focal lengths that are commonly used in many vision applications.
This paper has two contributions.
First, we present a first-order error analysis that shows the relation between focal length and estimation uncertainties of camera parameters.
To our knowledge, this error analysis with respect to focal length has not been studied in the area of camera calibration.
Second, we propose a robust algorithm to calibrate the camera with a long focal length without using additional devices.
By adding a regularization term, our algorithm makes the estimation of the image of the absolute conic well posed.
As a consequence, the covariance of camera parameters can be reduced greatly.
We further used simulations and real data to verify our proposed algorithm and obtained very stable results.
American Psychological Association (APA)
Liang, Mingpei& Huang, Xinyu& Chen, Chung-Hao& Zheng, Gaolin& Tokuta, Alade. 2014. Robust Calibration of Cameras with Telephoto Lens Using Regularized Least Squares. Mathematical Problems in Engineering،Vol. 2014, no. 2014, pp.1-9.
https://search.emarefa.net/detail/BIM-490733
Modern Language Association (MLA)
Liang, Mingpei…[et al.]. Robust Calibration of Cameras with Telephoto Lens Using Regularized Least Squares. Mathematical Problems in Engineering No. 2014 (2014), pp.1-9.
https://search.emarefa.net/detail/BIM-490733
American Medical Association (AMA)
Liang, Mingpei& Huang, Xinyu& Chen, Chung-Hao& Zheng, Gaolin& Tokuta, Alade. Robust Calibration of Cameras with Telephoto Lens Using Regularized Least Squares. Mathematical Problems in Engineering. 2014. Vol. 2014, no. 2014, pp.1-9.
https://search.emarefa.net/detail/BIM-490733
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-490733