Method and apparatus for shot detection
First Claim
Patent Images
1. A method comprising:
- identifying an abrupt transition in average light intensity between two frames; and
determining whether the abrupt transition was caused by a shot boundary between the two frames or by a flashlight event.
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Abstract
A system identifies an abrupt transition in content between two frames, and determines whether the abrupt transition was caused by a shot boundary between the two frames or by a flashlight event. Identification of the abrupt transition in content includes calculating a difference in light intensity histograms between the current frame and a preceding frame, and comparing the histogram difference to a dynamically determined threshold. Further, an average light intensity based method is used to determine whether the abrupt transition was caused by a shot boundary or by a flashlight event.
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Citations
33 Claims
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1. A method comprising:
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identifying an abrupt transition in average light intensity between two frames; and
determining whether the abrupt transition was caused by a shot boundary between the two frames or by a flashlight event. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A media analysis agent comprising:
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a shot boundary detector to statistically analyze one or more attributes associated with content in video frames to detect abrupt and gradual transitions in the video content indicative of a shot boundary; and
a flashlight detector, responsive to the shot boundary detector, to distinguish abrupt transitions in the video content caused by flashlight events from those caused by actual shot boundaries, to reduce false-positive identification of flashlight events as shot boundaries. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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- 23. A computer readable medium storing a plurality of executable instructions which, when executed, implement a media analysis agent to detect shot boundaries resulting from an abrupt or gradual transition in content between frames, and further to distinguish abrupt transitions caused by shot cuts from those caused by flashlight events.
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27. One or more computer-readable media having stored thereon a computer program that, when executed by one or more processors, causes the one or more processors to:
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calculate a difference in light intensity histograms between two frames;
compare the histogram difference to a dynamically determined threshold, wherein an abrupt transition is indicated if the histogram difference exceeds the threshold; and
determine whether the abrupt transition was caused by a shot boundary between the two frames or by a flashlight event. - View Dependent Claims (28, 29)
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30. An apparatus comprising:
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means for identifying an abrupt transition in average light intensity between two frames, wherein the means for identifying;
calculates a difference in light intensity histograms between the current frame and a preceding frame;
compares the histogram difference to a threshold value; and
means for determining whether the abrupt transition was caused by a shot boundary between the two frames or by a flashlight event. - View Dependent Claims (31, 32, 33)
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Specification