Method of and an apparatus for processing image data

摘要

Mask size data M and a sharpness enhancement coefficient K are set in accordance with the pixel density of image data Sij* to be output. The image data Sij* is determined as Sij*=Sij+Kx(Sij-Uij) using the mask size data M and the sharpness enhancement coefficient K, wherein the smoothed image data Uij is defined by the following equation: