@misc{indiciae089d95540a7b,
  title = {Shape from shaded random surfaces.},
  author = {E De Haan and R G Erens and A J Noest},
  year = {1995},
  doi = {10.1016/0042-6989(95)00050-a},
  url = {https://pubmed.ncbi.nlm.nih.gov/8533336/},
  note = {Source identifier: 8533336}
}