and there has been work going in this area even earlier than that: http://www.eecs.harvard.edu/~zickler/papers/Autotag_IVW2008.pdf http://www.eecs.harvard.edu/~

and there has been work going in this area even earlier than that: http://www.eecs.harvard.edu/~zickler/papers/Autotag_IVW2008.pdf http://www.eecs.harvard.edu/~zickler/papers/Autotag_IVW2008.... Andrew Gallagher has a number of publications in this domain: http://chenlab.ece.cornell.edu/people/Andy/publications/publications.html http://chenlab.ece.cornell.edu/people/Andy/publications/publ...