1. An apparatus for differently detecting an edge according to an area of an image, the apparatus comprising: a filter area selecting unit, selecting a filter area in which a plurality of adjacent pixels are included around an object pixel; and an edge detection unit, determining an edge value of the object pixel by using pixel data of the plurality of adjacent pixels in the filter area, wherein the filter area selecting unit determines a size of the filter area according to a distance between the object pixel and a center pixel of the image, and the edge detection unit determines a weight of the edge value of the object pixel according to the distance between the object pixel and the center pixel of the image.