Ryusuke Sagawa Katsushi Ikeuchi Taking Consensus of Signed Distance Field for Complementing Unobservable Surface. 410-417 2003 conf/3dim/2003 3DIM https://doi.org/10.1109/IM.2003.1240276 https://doi.ieeecomputersociety.org/10.1109/IM.2003.1240276 db/conf/3dim/3dim2003.html#SagawaI03