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Title:
ビデオシーケンス内の漸進的遷移の検出
Document Type and Number:
Japanese Patent JP2010507155
Kind Code:
A
Abstract:
A technique is disclosed for detecting gradual transitions between frames of a video sequence such as fade and dissolve transitions. For each frame, the intensity values of pixels at corresponding positions within a window of frames including the subject frame are compared, and signs are allocated to the calculated differences. The number of each type of sign is determined for each pixel position and the larger number of matching signs is assigned as a measure of the monotonicity of the direction of intensity variations at the pixel position between the frame and the surrounding frames. A global monotonicity measure is then calculated for the frame as a whole using the monotonicity values for each pixel position. This is repeated for each frame to generate a temporal sequence of frame intensity change monotonicity measures. Slopes within this temporal sequence representative of gradual transitions between video frames are detected. Alternatively, the values in the temporal sequence are compared with a threshold to identify values representative of gradual transitions between video frames.

Inventors:
Pashallakis, Stavros
Simmons, Daniel
Application Number:
JP2009532761A
Publication Date:
March 04, 2010
Filing Date:
October 05, 2007
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC R&D CENTRE EUROPE B.V.
International Classes:
G06T7/20; H04N5/91
Domestic Patent References:
JPH11252501A1999-09-17
JP2000217121A2000-08-04
JP2000299816A2000-10-24
JPH1118028A1999-01-22
JP2004295923A2004-10-21
Foreign References:
WO2006070601A12006-07-06
Attorney, Agent or Firm:
Michiharu Soga
Hidetoshi Furukawa
Suzuki Kenchi
Kajinami order
Masahiro Taguchi



 
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