Title :
On symmetric extensions orthogonal transforms of images, and paraunitary filter banks
Author :
De Queiroz, Ricardo L. ; Rao, K.R.
Author_Institution :
Dept. of Electr. Eng., Texas Univ., Arlington, TX, USA
Abstract :
Periodic or symmetric extensions are commonly used for processing images and other finite-length signals with a paraunitary filter bank (PUFB). Unlike infinite-length signals, PUFBs applied to finite-length signals will not necessarily lead to an orthogonal system. The authors show that for symmetric extensions, orthogonality is only possible for special PUFBs based on linear-phase filters. They also discuss implementation issues
Keywords :
FIR filters; delay circuits; digital filters; image reconstruction; signal flow graphs; transforms; PUFB; finite-length signals; images; implementation; linear-phase filters; orthogonal transforms; orthogonality; paraunitary filter banks; symmetric extensions; Channel bank filters; Colored noise; Delay; Discrete Fourier transforms; Distortion; Filter bank; Finite impulse response filter; Signal processing; Signal synthesis; Symmetric matrices;
Conference_Titel :
Image Processing, 1994. Proceedings. ICIP-94., IEEE International Conference
Conference_Location :
Austin, TX
Print_ISBN :
0-8186-6952-7
DOI :
10.1109/ICIP.1994.413432
