Vivian L. Blankers C. Elisa van den Heuvel Katrin Franke Louis Vuurpijl ICDAR 2009 Signature Verification Competition. 1403-1407 2009 ICDAR http://dx.doi.org/10.1109/ICDAR.2009.216 conf/icdar/2009 db/conf/icdar/icdar2009.html#BlankersHFV09