@ARTICLE{Hu2022Deep,
author={Hu, Junjie and Bao, Chenyu and Ozay, Mete and Fan, Chenyou and Gao, Qing and Liu, Honghai and Lam, Tin Lun},
journal={IEEE Transactions on Pattern Analysis and Machine Intelligence},
title={Deep Depth Completion from Extremely Sparse Data: A Survey},
year={2022},
volume={},
number={},
pages={1-20},
doi={10.1109/TPAMI.2022.3229090}}