Spherical objects and vanish points are often used for camera calibration. An occluding contour of a sphere is projected to a conic in the perspective image, and using a moving active camera, the trajectory of a vanishing point in the perspective images is also a conic when the camera is rotated about a fixed 3D axis whereas the translation of the camera is arbitrary. In fact, the problems of camera calibration using conics from spheres or vanishing points can be described by same mathematic representations. Two linear approaches to the problems are proposed in this paper: one based on the geometric interpretation of the relation between image conics and the image of the absolute conic, and the other using the special structure of the problems in algebra. Only three such conics are needed for the two linear approaches, and the minimum number for previous nonlinear optimization methods is also three. All five intrinsic parameters are recovered linearly without making assumptions, such as, zero-skew or unitary aspect ratio which are often used in previous methods. The two linear algorithms have been tested in extensive experiments with respect to noise sensitivity and also made comparisons with recent calibration techniques.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Linear approaches to camera calibration from sphere images or active intrinsic calibration using vanishing points


    Beteiligte:
    Xianghua Ying, (Autor:in) / Hongbin Zha, (Autor:in)


    Erscheinungsdatum :

    2005-01-01


    Format / Umfang :

    230411 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




    Structured light self-calibration with vanishing points

    Orghidan, R. | British Library Online Contents | 2014


    Camera calibration with spheres: linear approaches

    Hui Zhang, / Guoqiang Zhang, / Wong, K.-Y.K. | IEEE | 2005


    Camera Calibration with Spheres: Linear Approaches

    Zhang, H. / Zhang, G. / Kwan-Yee et al. | British Library Conference Proceedings | 2005


    Intrinsic and extrinsic active self-calibration of multi-camera systems

    Brückner, M. / Bajramovic, F. / Denzler, J. | British Library Online Contents | 2014