Patent ID: 7489335
Filing Date: 2009-02-10
Classification: G06T,H04N

Abstract:
1. A photographic apparatus comprising: a photographic lens section with adjustable photographic parameter; a photographic parameter detecting section for detecting the photographic parameter of said photographic lens section during photographing, wherein the photographic parameter is a focal length; a photoreceptor section for receiving image information formed by said photographic lens section; and an image correction section for receiving an image signal from said photoreceptor section, and for performing distortion correction of said image signal based on predetermined calibration parameters corresponding to the photographic parameter detected at said photographic parameter detecting section, wherein the predetermined calibration parameters include a lens distortion parameter and a principal position parameter, wherein the lens distortion parameter is k the calibration to x, a coordinate in x-axis, and y, a coordinate in y-axis in an image coordinate system, is done using following equations where c is a constant: