Earlier techniques are either based on boundary features [Kass et al., 1988] or manual sketches [Boykov and Lea, 2006]. In this project, we propose a new approach to partition “foreground” and “background” making use of distance data of real objects in the image. To be specific, when an image is taken by camera, there exists a one-to-one mapping from pixels in the image to real objects. For eac...