Wiener reconstruction of undersampled imagery.
We derive a Fourier-domain Wiener filter for the reconstruction of undersampled imagery. The filter differs from previous implementations in that it permits adjustment of the trade-offs between sharpness of the reconstruction, noise amplification, and aliasing artifact suppression. Additionally, a net transfer function that characterizes the combined effects of the imaging system and the reconstruction process is derived. This net transfer function is valid for both unaliased and aliased spatial frequencies. The expression for the net transfer function is applicable to more general linear image sharpening algorithms.
Thurman
Samuel T
ST
The Institute of Optics, University of Rochester, Rochester, New York 14627, USA. thurman@optics.rochester.edu
Fienup
James R
JR