Scene cut frame detector and scene cut frame group detector

Details Scene cut frame detector and scene cut frame group detector Scene cut frame detector and scene cut frame group detector

1996-09-13

1998-02-17

Au, Amelia

Television

Image signal processing circuitry specific to television

Motion dependent key signal generation or scene change...

H04N 514

Patent

active

057196435

ABSTRACT:
An input image and a reference image which are input to a contracted image processing unit, are converted into contracted image, which are constituted by average values of blocks of the input and reference frames. With respect to the contracted image, an inter-frame difference unit determines the inter-frame difference D.sub.n between the input and reference images and the temporal change .DELTA.D.sub.n in the inter-frame difference. A first judging unit judges, according to the above data, the input frame to be a non-cut frame, a cut frame or a cut frame candidate. When the input frame is judged to be a cut frame, an output unit effects a cut frame output, and then the next input frame processing is performed. With respect to a cut frame candidate, a chrominance histogram correlation unit calculates the correlation .rho. of the color distribution of the chrominance histogram by using contracted image of chrominance signal. A second judging unit makes an overall judgment on the inter-frame difference D.sub.n, temporal change .DELTA.D.sub.n therein, and correlation .rho. for the cut frame detection.

REFERENCES:
patent: 5032905 (1991-07-01), Koga
patent: 5099322 (1992-03-01), Gove
patent: 5404174 (1995-04-01), Sugahara
"Proposal of Colloquial Video Editing Systems Adopting Recognition Technique", Proceedings in the Society of Electronic Information Communication Engineers of Japan, D-II, vol. J75-D-II, No. 2, February 1992 by Ueda et al.
"Video Cut Frame Detection Using Filters", 1993 Autumn Meeting of the Electronic Information Communication Engineers of Japan, D264, 1993, by Otsuji et al.

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