Jonathan Balzer Thomas Morwald Isogeometric finite-elements methods and variational reconstruction tasks in vision - A perfect match. 1624-1631 2012 CVPR https://doi.org/10.1109/CVPR.2012.6247855 https://doi.ieeecomputersociety.org/10.1109/CVPR.2012.6247855 conf/cvpr/2012 db/conf/cvpr/cvpr2012.html#BalzerM12