@misc{indiciae8f02014ffcdd,
  title = {Contrast perception in imaging systems.},
  author = {G U Rao},
  year = {1970},
  doi = {10.1016/0020-708x(70)90099-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/5494297/},
  note = {Source identifier: 5494297}
}