Systems and methods for adjusting a signal used for the detection of the
movement of an object in a space represented by a set of data A.sub.ij,
associated with pixels forming a multidimensional space i, j, evolving
with time, and represented at a succession of instants T, wherein the
data are associated with the parameter A in the form of a digital signal
DATA(A), composed of a sequence A.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, in which the signals
A.sub.ijt are received, in which the threshold and the gain in detection
sensitivity of the parameter A are adapted.The detection sensitivity of
the parameter variation is also adapted.