1. An apparatus for correcting a motion of an image in an image processing system, the apparatus comprising: a frame memory which stores an input image signal as a current frame image; and a motion estimator/corrector which estimates a motion of an image within a predetermined motion estimation range in the current frame image on the basis of a previous frame image, detects an image area to be compressed from the current frame image, and provides the detected image area to be compressed as a current frame image area for normal motion estimation so that the motion of the input image signal can be corrected.