A digital imaging system is described that facilitates the location of anchors or targets in images of a scene. In one aspect, the digital imaging system makes use of differences as between the properties of the surfaces of the targets and the properties of the surfaces of the objects that are to be...http://www.google.com/patents/US7006086?utm_source=gb-gplus-sharePatent US7006086 - Method and apparatus for accurate alignment of images in digital imaging systems by matching points in the images corresponding to scene elements
