there is disclosed an apparatus for sharpening an edge in a video image . the apparatus comprises : 1 ) a first circuit for determining a first luminance value of a first pixel associated with the first edge and a second luminance value of a second pixel associated with the first edge , wherein the first and second pixels are adjacent pixels ; 2 ) a second circuit for determining a position of a first subpixel disposed between the first and second pixels , wherein the first subpixel position is disposed approximately at a center of the first edge ; 3 ) a third circuit for increasing a luminance value of a second subpixel disposed on a first side of the first edge center ; and 4 ) a fourth circuit for decreasing a luminance value of a third subpixel disposed on a second side . of the first edge center opposite the first side .