1. An image processing apparatus for use with a three-dimensional (3D) image divided into a left-eye image and a right-eye image, comprising: a disparity estimation unit estimating disparities between the left-eye image and the right-eye image; a movement determination unit determining a movement value for the left-eye image and the right-eye image using the estimated disparities; and a movement unit moving the left-eye image and the right-eye image based on the determined movement value.