RandomRooms: Unsupervised Pre-training from Synthetic Shapes and
         Randomized Layouts for 3D Object Detection
        Yongming Rao1 *, Benlin Liu2,3 *, Yi Wei1 , Jiwen Lu1 , Cho-Jui Hsieh2 , Jie Zhou1
             1
              Tsinghua University, 2 UCLA, 3 University of Washington
    raoyongming95@gmail.com; liubl@cs.washington.edu; wziyi20@mails.tsinghua.edu.cn;
                chohsieh@cs.ucla.edu; {lujiwen, jzhou}@tsinghua.edu.cn

               Abstract
  3D point cloud understa ...