Retrieval of document images using layout knowledge.

Per Herrmann Gunter Schlageter Retrieval of document images using layout knowledge. 537-540 1993 ICDAR https://doi.org/10.1109/ICDAR.1993.395678 https://doi.ieeecomputersociety.org/10.1109/ICDAR.1993.395678 conf/icdar/1993 db/conf/icdar/icdar1993.html#HerrmannS93