Zero-Shot Calibration of Fisheye Cameras
- URL: http://arxiv.org/abs/2011.14607v1
- Date: Mon, 30 Nov 2020 08:10:24 GMT
- Title: Zero-Shot Calibration of Fisheye Cameras
- Authors: Jae-Yeong Lee
- Abstract summary: The proposed method estimates camera parameters from the horizontal and vertical field of view information of the camera without any image acquisition.
The method is particularly useful for wide-angle or fisheye cameras that have large image distortion.
- Score: 0.010956300138340428
- License: http://creativecommons.org/licenses/by-nc-nd/4.0/
- Abstract: In this paper, we present a novel zero-shot camera calibration method that
estimates camera parameters with no calibration image. It is common sense that
we need at least one or more pattern images for camera calibration. However,
the proposed method estimates camera parameters from the horizontal and
vertical field of view information of the camera without any image acquisition.
The proposed method is particularly useful for wide-angle or fisheye cameras
that have large image distortion. Image distortion is modeled in the way
fisheye lenses are designed and estimated based on the square pixel assumption
of the image sensors. The calibration accuracy of the proposed method is
evaluated on eight different commercial cameras qualitatively and
quantitatively, and compared with conventional calibration methods. The
experimental results show that the calibration accuracy of the zero-shot method
is comparable to conventional full calibration results. The method can be used
as a practical alternative in real applications where individual calibration is
difficult or impractical, and in most field applications where calibration
accuracy is less critical. Moreover, the estimated camera parameters by the
method can also be used to provide proper initialization of any existing
calibration methods, making them to converge more stably and avoid local
minima.
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