System and method for automatically detecting a variation of vid

Details System and method for automatically detecting a variation of vid System and method for automatically detecting a variation of vid

1991-12-23

1993-10-12

Razavi, Michael T.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358108, 358105, H04N 530

Patent

active

052530701

ABSTRACT:
A system for automatically detecting a variation of video information, comprising a video information variation detecting circuit for converting a video signal outputted from a monitoring camera into digital data, storing the digital data, or video data by one frame and comparing the current inputted video data with the stored video data to detect a portion different from each other as the variation of video information, a microcomputer for controlling the system operation, and a video output control circuit for setting a window area on the screen and, if the video information variation detecting circuit detects the variation of video information in the set window area, outputting an alarm control signal and generating a variation indicating marker signal corresponding to the variation detected portion in the set window area, such that the marker signal is overlap-displayed on the current picture on the screen corresponding to the variation detected portion in the window area. Also, according to the present invention, there is provided a method of automatically detecting the variation of video information, which can be performed by the system of the present invention.

REFERENCES:
patent: 4081830 (1978-03-01), Mick
patent: 4198653 (1980-04-01), Kamin
patent: 4458266 (1984-07-01), Mahoney
patent: 4661853 (1987-04-01), Roeder et al.
patent: 4894716 (1990-01-01), Aschwanden et al.
patent: 5091780 (1992-02-01), Pomerleau

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