Robust Quad-Tree based Registration on Whole Slide Images. - Christian Marzahl; Frauke Wilm; Franz F. Dressler; Lars Tharun; Sven Perner; Christof A. Bertram; Christine Kröger; Jörn Voigt; Robert Klopfleisch; Andreas K. Maier; Marc Aubreville; Katharina Breininger (COMPAY@MICCAI, 2021)