An efficient algorithm for the design of circular symmetric linear phase recursive digital filters with separable denominator transfer function

In this paper we present a method for the design of a class of 2-D IIR filters with variable cutoff boundary. The transfer function of this class of 2-D filters has a zero phase 2-variable polynomial in z1 and 22 in the numerator and two separable polynomials [D1(zl), D2(z2)] in the denominator respectively. The transfomtion used for changing the cutoff boundary are Oppenheim's [l] for the numerator and spectral transformation [2,3] for the denominator of the transfer function respectively.Through examples it is shown that the propsed method results in 2-D filters having better circular contours than the existing techniques. This technique also allows one to perfom circular to elliptic transformation.

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A method for the design of a class of 2-D IIR variable cutoff boundary filters

Romanzin

Ahmadi

Shridhar

et al.

IEEE International Symposium on Circuits and Systems

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An efficient algorithm for the design of circular symmetric linear phase recursive digital filters with separable denominator transfer function

Cited by 1 publication

References 6 publications

A method for the design of a class of 2-D IIR variable cutoff boundary filters

A method for the design of a class of 2-D IIR variable cutoff boundary filters

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