Systems and methods for localizing a shape in a space represented by pixel data forming a multidimensional space i, j, evolving with time, and represented at a succession of instants T, wherein the data is associated with a temporal parameter A, B, . . . in the form of digital signals DATA(A), DATA(B), . . . composed of a sequence A.sub.ijt, B.sub.ijt, . . . of binary numbers of n bits associated with synchronization signals defining the instant T of the space and the position i, j in this space...