Jing Fang Xin Tao Zhi Tang Ruiheng Qiu Ying Liu Dataset, Ground-Truth and Performance Metrics for Table Detection Evaluation. 445-449 2012 Document Analysis Systems http://doi.ieeecomputersociety.org/10.1109/DAS.2012.29 conf/das/2012 db/conf/das/das2012.html#FangTTQL12