Kouta Fujimura Naokazu Yokoya Kazuhiko Yamamoto Motion tracking of deformable objects based on energy minimization using multiscale dynamic programming. 83-86 1992 ICPR (1) https://doi.org/10.1109/ICPR.1992.201513 conf/icpr/1992-1 db/conf/icpr/icpr1992-1.html#FujimuraYY92