@misc{indiciaebc619d898178,
  title = {Inferring local surface orientation from motion fields.},
  author = {D D Hoffman},
  year = {1982},
  doi = {10.1364/josa.72.000888},
  url = {https://pubmed.ncbi.nlm.nih.gov/7108647/},
  note = {Source identifier: 7108647}
}