FIELD: information technology.
SUBSTANCE: "long" and "short" accumulation of signal charges in adjacent frames (half-frames) is realised in a CCD matrix; a multiplexed video signal is formed at the output of a photodetector, and a multiplexed television signal is formed at the output of a television signal sensor; the multiplexed television signal is delayed by a frame (half-frame), and based on the observed image, weighted summation of the immediate and delayed video signals is performed via summation of the immediate video signal with a unit weighting coefficient K and the delayed video signal is summed with coefficient K selected based on the inequality 0<K<1, and that adjustment is augmented with selection of the optimum duration of the "short" accumulation in the CCD matrix.
EFFECT: high accuracy of recursive filtration as a result of a higher signal-to-noise ratio of the output interference pattern signal through further control of the accumulation time of the delayed component of said video signal.
3 cl, 5 dwg, 2 tbl
