Interpolated Gaussian scale-space filters

Computationally efficient interpolated Gaussian scale-space filters are introduced. The proposed scale-space filters incorporate multirate signal-processing methods and are realized using multistage filter structures. The scale-space filters can also be used in decimating the data, if desired. The proposed filtering methods require dramatically less computation than conventional Gaussian scale-space filtering, especially where the scale changes with an integer factor. The filters are extremely efficient when the change in scale is an integer power of an integer constant