Patent ID: 6937282

Claim:
A method for correcting influences of a distortion aberration of a lens in an image formed on an image surface by said lens, wherein distortions and at least one kind of an image information belonging to each position of the image are corrected according to a distortion aberration characteristic of the lens, and the distortion aberration characteristic indicates distortions at respective distances from an optical axis of the lens on said image surface, wherein the distortion aberration characteristic is expressed by a distortion ratio f(r)=(r′−r)/r, where the distances from the optical axis on said image surface after correction of said position information are denoted by r, and said distances from the optical axis on said image surface before correction of said position information are denoted by r′, points of the image before the correction having coordinates (x′, y′) corresponding to predetermined points of the image after the correction having coordinates (x, y) are obtained based on equations, x′=x{ 1+ f ( r )}, and y′=y { 1+ f ( r )}, where a position of the optical axis on the image surface is assumed to have coordinates (0, 0), and values of said at least one kind of image information at the corresponding points of the image before the correction having the coordinates (x′, y′) are obtained, as values D′ of said at least one kind of image information at said predetermined points of the image after the correction having the coordinates (x, y), based on a value or values of said at least one kind of image information at one or more image points having the coordinates (u, v) located near each of the corresponding points having the coordinates (x′, y′) on the image before the correction, where u and v are integers.