1. A system for image processing, comprising: circuitry configured to: receive a plurality of stereo images of an anatomical portion from an imaging device; identify a first set of key points with a point density greater than a threshold value, based on a match of each key point of a left image with corresponding key point of a right image of said received plurality of stereo images of said anatomical portion; determine a second set of key points based on filtration of at least one outlier key point from said identified first set of key points; determine a disparity between a plurality of key points of said determined second set of key points; smoothen said disparity between said plurality of key points of said determined second set of key points; and reconstruct a three dimensional (3D) anatomical surface of said anatomical portion based on said smoothened disparity between said plurality of key points of said determined second set of key points.