Xu Liu Jiayan Cao Qianqian Bi Jian Wang Boxin Shi Yichen Wei Dense Point Diffusion for 3D Object Detection. 762-770 2020 3DV https://doi.org/10.1109/3DV50981.2020.00086 conf/3dim/2020 db/conf/3dim/3dim2020.html#LiuCBWSW20