@patent{BlaRomSchTor07, title = {Pattern detection}, author = {Blake, A. and Romdhani, S. and Sch{\"o}lkopf, B. and Torr, P. H. S.}, howpublished = {United States Patent, No 7236626}, month = jun, year = {2007}, note = {(expired)}, doi = {}, month_numeric = {6} }