Patent ID: 8478066
Filing Date: 2013-07-02
Classification: H04N

Abstract:
1. An image-correction method for correcting an image obtained by a solid-state image pickup device of an image pick-up apparatus, comprising: a distance calculating step of calculating, by utilizing a distance calculating unit, a distance between the coordinates of an image-constituting pixel obtained by said solid-state image pickup device and predetermined reference coordinates; a distance-correction value calculating step of receiving the calculated distance as an input variable of an N-order function having a plurality of coefficients for the input variable, and calculating a distance-correction value as an output value of the N-order function, N being a positive integer greater than or equal to 2; a correction coefficient calculating step of calculating, based on a preliminarily set table that represents correspondences between distance-correction values and correction coefficients, a correction coefficient corresponding to the calculated distance-correction value; a pixel signal correcting step of correcting a signal for the pixel based on the calculated correction coefficient; and an updating step of updating distance-correction values by individually changing the coefficients for the input variable in said N-order function in the distance-correction value calculating step in response to change in optical settings including setting of a diaphragm mechanism and setting of an optical zooming function of an optical system of said image pick-up apparatus, said optical system directing light onto said solid-state image pickup device.