@misc{indiciae9b701dcea30d,
  title = {Range estimation by optical differentiation.},
  author = {H Farid and E P Simoncelli},
  year = {1998},
  doi = {10.1364/josaa.15.001777},
  url = {https://pubmed.ncbi.nlm.nih.gov/9656478/},
  note = {Source identifier: 9656478}
}