http://www.dlib.org/dlib/november98/11roes.html http://www.dlib.org/dlib/november98/11roes.html http://www.dlib.org/dlib/november98/11roes.html http://www.dlib.org/dlib/november98/11roes.html http://www.dlib.org/dlib/november98/11roes.html electronic edition @ dlib.org http://www.dlib.org/dlib/november98/11roes.html http://www.dlib.org/dlib/november98/11roes.html Bot et al. (1998) http://www.dlib.org/dlib/november98/11roes.html