Title :
Design of directional filters using downsampling
Author :
Suzuki, Satoshi ; Ikehara, Masaaki
Author_Institution :
Dept. of Electr. Eng., Keio Univ., Japan
Abstract :
We present a design method of a directionally oriented 2-D filter (directional filters) and filter bank. At first, we consider the 2-D prototype passband filter. Next, using downsampling, we decimate the prototype filter coefficient and design the directional filters. The passband regions of the component filters are wedge shaped and thus provide the directional information. By using this method, we can reduce the number of filters which we must design. Finally, we show the 2-D filter bank structure with above-mentioned filter
Keywords :
band-pass filters; filtering theory; signal sampling; two-dimensional digital filters; 2D filter bank structure; 2D prototype passband filter; component filters; directional filters design; directional information; directionally oriented 2D filter; downsampling; filter bank design; passband regions; prototype filter coefficient; wedge shaped; Band pass filters; Design methodology; Digital filters; Digital signal processing; Filter bank; Information filtering; Information filters; Low pass filters; Passband; Prototypes;
Conference_Titel :
TENCON '96. Proceedings., 1996 IEEE TENCON. Digital Signal Processing Applications
Conference_Location :
Perth, WA
Print_ISBN :
0-7803-3679-8
DOI :
10.1109/TENCON.1996.608452
