Method of and apparatus for reducing noise in a motion detector

Details Method of and apparatus for reducing noise in a motion detector Method of and apparatus for reducing noise in a motion detector

1994-06-03

1996-08-06

Metjahic, Safet

Television

Image signal processing circuitry specific to television

Noise or undesired signal reduction

348701, H04N 521

Patent

active

055438580

ABSTRACT:
A method of reducing noise in the signal of a motion detector for recursive filtering of video signals, in which the signal is median-filtered. A part of the amplitude range of this signal located below a threshold value is suppressed and the signal is subsequently used for forming the factor (k) controlling the recursive filter. In the case of stationary images or images of little motion, the factor (k) is set at a maximum value dependent upon interference pulses occurring in the video input signal (V1) and at a minimum value dependent upon interference pulses occurring in the video output signal (V2).

REFERENCES:
patent: 4195350 (1980-03-01), Moore
patent: 4485403 (1984-11-01), Illetschko
patent: 4539594 (1985-09-01), Illetschko
patent: 4652907 (1987-03-01), Fling
patent: 4661853 (1987-04-01), Roeder et al.
patent: 5185664 (1993-02-01), Darby

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