01282nas a2200229   4500000000100000000000100001008004100002260001200043653001700055653002800072653002400100653001600124100002300140700002200163700001800185245004800203856009800251300001000349490000600359520067300365022001401038       2016                            d  c09/201610aFocal Length10aNonlinear Cost Function10aProjection Matrices10aZoom Camera1 aIsmail El Batteoui1 aAbderrahim Saaidi1 aKhalid Satori00aA Self-Calibration Method of Zooming Camera  uhttp://www.ijimai.org/JOURNAL/sites/default/files/files/2016/02/ijimai20164_1_4_pdf_94156.pdf  a19-250 v43 aIn 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.  a1989-1660