DocumentCode :
937916
Title :
Applications of complex filters to realize three-dimensional combined DFT/LDE transfer functions
Author :
Bruton, L.T. ; Bartley, N.R.
Author_Institution :
Dept. of Electr. & Comput. Eng., Calgary Univ., Alta., Canada
Volume :
39
Issue :
6
fYear :
1992
fDate :
6/1/1992 12:00:00 AM
Firstpage :
391
Lastpage :
394
Abstract :
The recently proposed method of combined discrete Fourier transform (DFT)/linear difference equation (LDE) filtering of three-dimensional (3-D) spatio-temporal signals employs LDEs with real coefficients. It is shown that the real-coefficient LDEs impose transfer function symmetries that prevent the 3-D filter from distinguishing between 3-D input signals having reflective symmetry in the direction of the LDE filtering. These transfer function symmetry constraints are relaxed by using complex-coefficient LDEs
Keywords :
Fourier transforms; band-pass filters; difference equations; filtering and prediction theory; multidimensional digital filters; picture processing; transfer functions; 3D signals; combined DFT/LDE transfer functions; complex-coefficient; discrete Fourier transform; linear difference equation; three-dimensional filters; Difference equations; Digital filters; Discrete Fourier transforms; Filtering; Frequency response; Multidimensional systems; Nonlinear filters; Principal component analysis; Transfer functions; Two dimensional displays;
fLanguage :
English
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
Publisher :
ieee
ISSN :
1057-7130
Type :
jour
DOI :
10.1109/82.145298
Filename :
145298
Link To Document :
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