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.<>
On symmetric extensions orthogonal transforms of images, and paraunitary filter banks
Proceedings of 1st International Conference on Image Processing ; 1 ; 835-839 vol.1
1994-01-01
423350 byte
Conference paper
Electronic Resource
English
On Symmetric Extensions, Orthogonal Transforms of Images, and Paraunitary Filter Banks
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