@misc{indiciae0b9bb0dad6f5,
  title = {A 2D FFT filtering program for image processing with examples},
  author = {Kenneth Watson},
  year = {1992},
  doi = {10.3133/ofr92265},
  url = {https://pubs.usgs.gov/publication/ofr92265},
  note = {Source identifier: ofr92265}
}