1. A method of sampling feature points for image matching, the method comprising: dividing a first image into a plurality of regions corresponding to a number of feature points to be sampled; extracting a feature point from each of the regions such that a distance between an extracted feature point of one region and an extracted feature point of another region satisfies a predetermined condition; and estimating a homography based on extracted feature points of the first image and corresponding feature points of a second image to be matched with the first image, wherein the extracting comprises: extracting a first feature point from among feature points in a first region; extracting a second feature point from among feature points in a second region which are spaced apart by a first distance or more from the first feature point; extracting a third feature point from among feature points in a third region which are spaced apart by a second distance or more from the second feature point; and extracting a fourth feature point from among feature points in a fourth region which are spaced apart by a third distance or more from the third feature point.