@misc{indiciaec41749e82419,
  title = {Optimal frequency domain textural edge detection filter},
  author = {Townsend, J. K. and Shanmugan, K. S. and Frost, V. S.},
  year = {1985},
  url = {https://ntrs.nasa.gov/citations/19850060354},
  note = {Source identifier: 19850060354}
}