Design of Adjustable Square-Shaped 2D IIR Filters

Figure 5

(a) Frequency response of a square-shaped filter with orientation 𝜑=3𝜋/8 and 𝑝=0.54 (bandwidth 𝜔₀=1.85≅0.589𝜋); (b) contour plot of this filter; (c), (d) frequency response and contour plot of one oriented filter.

(a)

(b)

(c)

(d)