Patent Document ID: 9697591
Application ID: 15056053
Patent Status: 1

Claim One:
1. A non-dyadic lens distortion correction method comprising: (a) acquiring a non-dyadic lens image photographed through a non-dyadic lens; (b) correcting geometric distortion for the non-dyadic lens image by stage by applying a magnification ratio based on a projection model; and (c) compensating a high-frequency component of an image corrected in a previous step by the patch unit in the non-dyadic lens image of which the geometric distortion is corrected, wherein step (b) includes: calculating a phased compensation point p i depending on the magnification ratio by multiplying a distortion function in the projection model by the magnification ratio, calculating a corresponding point n i corresponding to the phased compensation point p i on a straight line connecting a principal point and a point P in a 3D space based on the projection model, calculating a focus F i of a parabolic equation passing through an optical axis on an image plane and the corresponding point n i , and correcting the geometric distortion of the non-dyadic lens image depending on the magnification ratio by using the focus F i .