1. An electronic device comprising: an image capturing device configured to receive a scene; and one or more circuits configured to: receive depth of field (DOF) information of the scene; segment at least one image of said scene into a plurality of candidate segmented regions based on said DOF information; determine a first candidate segmented region of said plurality of candidate segmented regions as a region-of-interest to autofocus on said first candidate segmented region; generate a saliency map for said at least one image of said scene based on an optical flow technique; and overlap said saliency map with each of said plurality of candidate segmented regions for said determination of said first candidate segmented region as said region-of-interest.