Symmetry Study for Delta- Operator-Based 2-D Digital Filters

摘要: The complexity in the design and implementation of two-dimensional (2-D) filters can be considerably reduced if we utilize symmetries that might present frequency response these filters. As delta-operator formulation digital offers better numerical accuracy lower coefficient sensitivity narrowband filter designs when compared to traditional shift-operator formulation, it is desirable have efficient techniques gamma-domain which various specifications. With this motivation, comprehensively establish theory constraints for formulated discrete-time real-coefficient polynomials functions, arising out many types their magnitude responses. We also show as sampling time tends zero, symmetry merge with those s-domain constraints. then a least square error criterion based procedure 2-D utilizes properties specification. A example provided illustrate savings computational resulting from use