An apparatus is described for detecting minutiae in a two-dimensional binary image. In a preferred embodiment a two-dimensional binary data bit stream of an image is enhanced in an enhancement circuit by pore-fill and line-thin operations. The enhanced binary data bit stream is then applied in parallel...http://www.google.fr/patents/US4083035?utm_source=gb-gplus-shareBrevet US4083035 - Binary image minutiae detector
