O^2-Recon: Completing 3D Reconstruction of Occluded Objects in the Scene with a Pre-trained 2D Diffusion Model. - Hu, Yubin; Ye, Sheng; Zhao, Wang; Lin, Matthieu; He, Yuze; Wen, Yu-Hui; He, Ying; Liu, Yong-Jin (CoRR, 2023)