Method and apparatus for detecting fades in digital video sequen

Details Method and apparatus for detecting fades in digital video sequen Method and apparatus for detecting fades in digital video sequen

1992-02-14

1993-09-14

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358185, H04N 5262

Patent

active

052454363

ABSTRACT:
A method and apparatus for detecting a fade within a sequence of digital motion video frames. A first frame and a previous frame are selected from the sequence as first and second regions, respectively, for processing. The mean of the first region and the mean of the second region are each calculated and the relative mean change between the means is determined. A fade is detected if the relative mean change exceeds a first predetermined threshold. Alternatively, a fade is detected if the relative mean change is less than the first predetermined threshold but greater than a second predetermined threshold and the magnitude of the difference between the means is greater than a third predetermined threshold.

REFERENCES:
patent: 3970774 (1976-07-01), Bazin et al.
patent: 4198653 (1980-04-01), Kamin
patent: 4218704 (1980-08-01), Netravali et al.
patent: 4233631 (1980-11-01), Mahler
patent: 4340903 (1982-07-01), Tamura
patent: 5151945 (1992-09-01), Lee et al.

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