SA-ConvONet: Sign-Agnostic Optimization of
                 Convolutional Occupancy Networks

       Jiapeng Tang1,4 , Jiabao Lei1 , Dan Xu2 , Feiying Ma4 , Kui Jia1,5,6 , and Lei Zhang3,4
    1
      School of Electronic and Information Engineering, South China University of Technology
           2
            Department of Computer Science and Engineering, HKUST, HK
         3
          Department of Computing, The Hong Kong Polytechnic University, HK
                    4
                     ...