1. An image processing apparatus, comprising: a region of interest (ROI) configuration unit to generate a visual attention map in correspondence to an input three dimensional (3D) image; and a disparity adjustment unit to adjust disparity information included in the input 3D image, using the visual attention map, wherein the disparity adjustment unit enables a portion having a highest visual attention level, verified from the visual attention map, to have a disparity level minimizing visual fatigue of human, wherein at least one of the ROI configuration unit and the disparity adjustment unit comprises one or more processors.