Patent ID: 9218650
Filing Date: 2015-12-22
Classification: G06T,H04N

Abstract:
1. An image processing method, which is applicable to images captured by a wide-angle zoomable lens, said method comprising steps of: A. utilizing the wide-angle zoomable lens to photograph a calibration pattern under a predetermined focal length to obtain a distorted image corresponding to the calibration pattern; B. calculating a distortion parameter for the wide-angle zoomable lens at the predetermined focal length; C. utilizing the wide-angle zoomable lens to photograph an object under another focal length to obtain another distorted image corresponding thereto; D. calculating a new distortion parameter by using the distortion parameter obtained from Step B and a multiple relation between said another focal length and the predetermined focal length; and E. using the new distortion parameter to perform distortion correction on said anther distorted image corresponding to the object; wherein in Step D, when said another focal length is r times the predetermined focal length, the new distortion parameter is 1/r