FRACTIONAL DUALITY IN HOMOGENEOUS BI-ISOTROPIC MEDIUM

A filtering method and apparatus for discriminating targets from noise in space-time data consisting of a plurality of binary data frames, each containing an equal number of points, are disclosed. Noise filtering for target detection is performed by recursively determining whether the points of a sequence of M of the binary data frames form at least one continuous string, or at the next highest level of discrimination, monotonic continuous string by logically comparing each binary data frame with the two binary data frames which precede and follow it on a point by point basis.