@article{opaobjectplacementassessmentdataset,
  title = {OPA: Object Placement Assessment Dataset},
  author = {Liu Liu and Zhenchen Liu and Bo Zhang and Jiangtong Li and Li Niu and Qingyang Liu and Liqing Zhang},
  year = {2021},
  eprint = {2107.01889},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2107.01889v3},
}