DESIGN METHOD FOR WEDGE-SHAPED FILTERS

We present an analytical design method for a particular class of two-dimensional filters, namely wedge filters. The method relies on a frequency mapping which is applied to a 1D IIR low-pass prototype filter of a desired shape. We used as prototypes a flat-top filter and a Gaussian filter. Such filters have applications in texture analysis based on spatial filtering using various filter banks. In this paper we approached the wedge filter design method, without actually presenting an application in texture classification or other image processing tasks, which are extensively treated in other works.