Patent ID: 7301565
Filing Date: 2007-11-27
Classification: H04N

Abstract:
1. A correction method comprising the steps of: dividing digital image data, which indicates a subject image photographed via an optical lens and in which a plurality of pixel rows each of which includes a plurality of pixels arranged in a line direction are arranged in an orthogonal direction orthogonal to the line direction, into four quadrants by an axis in the line direction and an axis in the orthogonal direction which pass through an optical center corresponding to a center of the optical lens, dividing each of the quadrants into a plurality of strip regions by a plurality of lines in the orthogonal direction, and correcting an optical distortion successively from a pixel row which is closest to the axis in the line direction or a pixel row which is furthest from the axis in the line direction for each of the strip regions; and performing data transfer with an image data storing component, which stores the digital image data, according to a corresponding correction order for each of pixels arranged continuously in the line direction, wherein when the optical distortion is a spool type optical distortion, correction is performed so as to use a predetermined number of pixel rows which include an uncorrected pixel further from the optical center than a corrected pixel row within the strip region, and when the optical distortion is a barrel type optical distortion, correction is performed so as to use a predetermined number of pixel rows which include an uncorrected pixel closer to the optical center than a corrected pixel row within the strip region.