Method and apparatus for detecting fades in digital video sequences
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United States of America Patent
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Sep 14, 1993
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app pub date -
Feb 14, 1992
filing date -
Feb 14, 1992
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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.
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