An efficient algorithm for the design of equiripple two-dimensional FIR digital filters

An efficient algorithm is presented for performing optimal Chebyshev approximation in the absence of the Haar condition. It has been successfully used in the design of two-dimensional FIR low-pass filters with and without symmetry constraints in the impulse response and also in the design of special classes of one-dimensional FIR filters with impulse response constraints such as interpolation filters.