NASA NTRS · 19860032166
Solution of the two-dimensional spectral factorization problem
Abstract
An approximation theorem is proven which solves a classic problem in two-dimensional (2-D) filter theory. The theorem shows that any continuous two-dimensional spectrum can be uniformly approximated by the squared modulus of a recursively stable finite trigonometric polynomial supported on a nonsymmetric half-plane.
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Lawton, W. M.. 1985-02-01. Solution of the two-dimensional spectral factorization problem. https://ntrs.nasa.gov/citations/19860032166
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