Apostolos Antonacopoulos Stefan Pletschacher David Bridson Christos Papadopoulos ICDAR 2009 Page Segmentation Competition. 1370-1374 2009 ICDAR http://dx.doi.org/10.1109/ICDAR.2009.275 conf/icdar/2009 db/conf/icdar/icdar2009.html#AntonacopoulosPBP09