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Author: search.filters.author.Matsuura, TakenobuSubject: search.filters.subject.Coplanar calibration

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    A determination method of initial camera parameters for coplanar calibration
    (2009-11-26)
    Sirisantisamrid, Kaset
    ;
    Tirasesth, Kitti
    ;
    Matsuura, Takenobu
    Most coplanar calibration algorithms determine the initial camera parameters from a single image under the assumption that the principal point is known in advance. However, the camera orientations, the shifted principal point and the noise corrupted on images have an influence on the estimated initial camera parameters under the above assumption. This paper proposes a useful method to determine the initial camera parameters for coplanar calibration. The proposed method can determine the initial camera parameters from the single image, wherein the principal point is considered as a parameter. In our experiments, both synthetic and real images are used. The experimental results show that the proposed method provides both stable initial camera parameters and noise robustness for changes of camera orientations, noise levels and shifts of principal point. © ICROS, KIEE and Springer 2009.
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    A determination method for initial values of coplanar camera calibration parameters
    (2006-12-01)
    Sirisantisamrid, Kaset
    ;
    Matsuura, Takenobu
    ;
    Tirasesth, Kitti
    This paper discusses a determination method for initial values of coplanar camera calibration parameters. In the conventional methods, it is assumed that the image center is ignored or known in advance. The determination of the initial calibration parameters of image corrupted with quantization noise and lens distortion becomes sometimes unstable under the above assumption. In this paper, a method to find the stable initial values of the calibration parameters is proposed under assumption on the aspect ratio of the image. In order to show the effectiveness of the proposed method, the comparison results with the conventional method are shown. It was found from the experimental results that the proposed method gives more accurate results than those of the conventional methods. ©2006 IEEE.