Design of factorable lowpass 2-dimensional digital filters satisfying prescribed specifications

Two methods have been developed for the design of lowpass 2-D digital filters satisfying prescribed amplitude-response specifications. The first method, which uses a one-dimensional minimax technique and is an improved version of the Kayser method, yields nonrecursive separable filters. The second method uses a one-dimensional design method proposed by Antoniou (1978) and yields recursive separable filters. Both methods involve a minimum amount of computation.