Reconstruction of nonperiodic two-dimensional signals from signal crossings. Curtis, S., Shitz, S., & Oppenheim, A. V. IEEE Transactions on Acoustics, Speech, and Signal Processing, ASSP-35:890-893, 1987.
bibtex   
@article{ Curtis_etal87,
  author = {Curtis, S.R. and Shitz, S. and Oppenheim, A. V.},
  title = {Reconstruction of nonperiodic two-dimensional signals from signal
	crossings},
  journal = {IEEE Transactions on Acoustics, Speech, and Signal Processing},
  year = {1987},
  volume = {ASSP-35},
  pages = {890-893},
  en_number = {3.2.2:7}
}

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