Yuanlong Shao Xinguo Liu Xueying Qin Yi Xu Hujun Bao Locally Developable Constraint for Document Surface Reconstruction. 226-230 2009 ICDAR http://dx.doi.org/10.1109/ICDAR.2009.57 conf/icdar/2009 db/conf/icdar/icdar2009.html#ShaoLQXB09