Title :
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
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;
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
DOI :
10.1109/ECCTD.2011.6043352
