Apparatus and method for detecting motion in a video signal

Details Apparatus and method for detecting motion in a video signal Apparatus and method for detecting motion in a video signal

1996-11-05

1998-03-24

Britton, Howard W.

Television

Special applications

Observation of or from a specific location

348699, H04N 718

Patent

active

057318328

ABSTRACT:
A system detects motion in a video signal by identifying differences between a current image frame and a reference image frame. A difference profile is calculated that represents the differences between the current image frame and the reference image frame. A motion detection signal is generated by the system if the difference profile exceeds a threshold. In one configuration, the system replaces the reference image frame with each successive current image frame. In other configurations, the system replaces the reference image frame with the current image frame if the difference profile exceeds the threshold. The system generates difference data associated with the differences between the current image frame and the reference image frame. This difference data can be partitioned into multiple blocks. An average value is calculated for each block of difference data. Upon generation of a motion detection signal, the system may be configured to record the current image frame if the difference profile exceeds the threshold.

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patent: 5034817 (1991-07-01), Everett
patent: 5103254 (1992-04-01), Bell et al.
patent: 5581297 (1996-12-01), Koz et al.
patent: 5602585 (1997-02-01), Dickinson

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