System for selecting a keyframe to represent a video
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United States of America Patent
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Jan 5, 2010
Grant Date -
Jan 6, 2005
app pub date -
Jul 26, 2004
filing date -
Jan 29, 1999
priority date (Note) -
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Abstract
A key frame representative of a sequence of frames in a video file is selected. The sequence of frames is divided into shots, sequences of frames captured by a single continuous operation of the camera, by detecting shot boundaries. Shot boundaries are detected by measuring changes in motion activity between frames using measures of pixel intensity and histogram differences between frames. The most interesting shot in the sequence of frames is selected using measures of motion activity, spatial activity, skin pixel color and shot length. The key frame is selected in the most interesting shot using measures of spatial activity and motion activity.
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