A class of selective band-pass CNN linear filters

Abstract

In this paper we introduce a design method for a class of linear spatial filters implemented on CNNs. The aim is to realize selective band-pass filters with templates of minimum-size. The design procedure relies on 1D HR low-pass and band-pass prototype filters, from which we realize different types of 2D band-pass filters, basically belonging to two classes, namely filters with circular symmetry (based on a LP-BP transformation) and separable filters. Simulation results are provided which illustrate the capabilities of these filters on a real grayscale image.