1. A method of correcting image distortion, the method comprising: receiving an image with a distortion from a wide-angle lens; extracting a distortion coefficient for the image with the distortion caused by the wide-angle lens; correcting the distortion of the image using the extracted distortion coefficient; wherein the step of correcting the distortion comprises fitting a curve at outer portions of the corrected image in order to reduce blurring at outer portions of the corrected image; wherein the step of fitting the curve comprises selecting a plurality of points based on an inflection point in an R C -R D graph and fitting the curve using the selected plurality of points; wherein R C is a distance from a predetermined point to an origin of a coordinate system of the corrected image, and R D is a distance from a predetermined point to the origin of a coordinate system of the image with the distortion, and displaying the corrected image.