1. A computer-implemented method for calibrating a three dimensional (3D) stereoscopic display system, comprising: a computer performing: rendering a virtual model of at least one physical object placed at a location on a surface of a display of the 3D stereoscopic system, wherein the virtual model is geometrically similar to the at least one physical object; aligning a first vertex of the virtual model with a corresponding first vertex of the at least one physical object; and adjusting a second vertex of the virtual model such that the second vertex is substantially coincident with a corresponding second vertex of the at least one physical object.