Sc. Pei et Cc. Tseng, 2-DIMENSIONAL IIR DIGITAL NOTCH FILTER DESIGN, IEEE transactions on circuits and systems. 2, Analog and digital signal processing, 41(3), 1994, pp. 227-231
In this paper, the two dimensional (2D) IIR digital notch filter desig
n problem is investigated. First, we develop a simple algebraic method
for 2D IIR notch filter design. This approach not only has closed-for
m transfer function but also satisfies bounded-input/bounded-output (B
IBO) stability condition. Next, we apply the 2D notch filter to elimin
ate sinusoidal/narrowband interferences superimposed on an image. Simu
lation results are presented to demonstrate the effectiveness of this
approach.