Two-dimensional filter design based on frequency mapping of analog prototype filters

Author

Matei, Radu ; Goras, Liviu

Author_Institution

Fac. of Electron., Telecommun. & Inf. Technol., Gh.Asachi Tech. Univ. of Iasi, Iasi, Romania

fYear

2011

Firstpage

326

Lastpage

329

Abstract

In this work an analytical design method for two types of 2D recursive filters is proposed. The design starts from a given analog prototype filter with specified parameters and a transfer function which is factorized into elementary (biquad) functions. Applying adequate frequency transformations to these functions, the desired 2D filters are directly obtained in a factorized form, preserving the selectivity properties of their 1D counterparts. The types of 2D filters approached here are narrow orientation-selective filters with a specified orientation and maximally-flat low-pass filters with circular symmetry. Design examples starting from imposed specifications and simulation results are provided.

Keywords

low-pass filters; transfer functions; 2D recursive filter; analog prototype filter; biquad function; circular symmetry; frequency mapping; maximally-flat low-pass filter; orientation-selective filter; transfer function; two-dimensional filter design; Filter banks; Finite impulse response filter; IIR filters; Low pass filters; Prototypes; Transfer functions; 2D filter design; frequency mapping; image filtering;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuit Theory and Design (ECCTD), 2011 20th European Conference on

Conference_Location

Linkoping

Print_ISBN

978-1-4577-0617-2

Electronic_ISBN

978-1-4577-0616-5

Type

conf

DOI

10.1109/ECCTD.2011.6043352

Filename

6043352