@misc{indiciae08613bc505ff,
  title = {Face recognition from a single training image under arbitrary unknown lighting using spherical harmonics.},
  author = {Lei Zhang and Dimitris Samaras},
  year = {2006},
  doi = {10.1109/tpami.2006.53},
  url = {https://pubmed.ncbi.nlm.nih.gov/16526422/},
  note = {Source identifier: 16526422}
}