A Self-Calibration Method of Zooming Camera

• Main Authors: Ismail El Batteoui, Abderrahim Saaidi, Khalid Satori
• Format: Article
• Language: English
• Published: Universidad Internacional de La Rioja (UNIR) 2016-09-01
• Series: International Journal of Interactive Multimedia and Artificial Intelligence
• Subjects: Focal Length; Nonlinear Cost Function; Projection Matrices; Zoom Camera
• Online Access: http://www.ijimai.org/journal/node/906

In this article we proposed a novel approach to self- calibrate a camera with variable focal length. We show that the estimation of camera’s intrinsic parameters is possible from only two points of an unknown planar scene. The projection of these points by using the projection matrices in two images only permit us to obtain a system of equations according to the camera’s intrinsic parameters . From this system we formulated a nonlinear cost function which its minimization allows us to estimate the camera’s intrinsic parameters in each view. The results on synthetic and real data justify the robustness of our method in term of reliability and convergence.