A design method for 2-D low-pass maximally flat FIR digital filter to realize various passband shapes
Taiki Shinohara, Yasuyuki Nishida, Naoyuki Aikawa · 2016
Two-dimensional (2-D) linear phase maximally flat finite impulse response (FIR) digital filters have flat passbands and stopbands. Conventionally, there are only fan-shaped or diamond-shaped. In this paper, we propose a method for designing 2-D low-pass maximally flat FIR digital filters that can realize various passband shapes. The proposed transfer function is achieved as a closed-form expression, and various passband shapes can be created by changing the filter order or flatness degree.