METHOD FOR DETECTING A MOVING OBJECT IN MOTION VIDEO AND APPARATUS THEREFOR
First Claim
1. A method for detecting a video moving object comprising:
- (a) determining whether a video signal corresponding to a unit area represents a background area or a non-background area, the video signal being part of a reconstructed video signal acquired by a video decoder which decodes encoded data obtained by compression-encoding a motion video signal;
(b) detecting adjacent unit areas representing the non-background area using a determination result of the determining for each unit area to determine the adjacent unit areas as an area of a moving object;
(c) computing a cross correlation value between a current frame of the reconstructed video signal and a video signal preceding by one frame every unit area,(d) storing, a storage unit, a background video signal corresponding to a background component of the reconstructed video, and(e) computing a second cross correlation value between the current frame of the reconstructed video signal and the background video signal stored in the storage unit every unit area,wherein the determining (a) includes (f) determining whether the video signal in the unit area is a background area or a nonbackground area on the basis of encoding mode information obtained from the video decoder, the first cross correlation value and the second cross correlation value.
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Abstract
An apparatus for detecting a moving object in motion video comprises a macro-block determining section for determining the background/non-background of each macro-block of a reconstructed video signal from a video decoder section which decodes encoded data obtained by compression-encoding a motion video signal, a moving object determining section for determining an area of the moving object from the result of the determination on the background/non-background, and a moving object combination display for displaying information indicating the area of the moving object on a display screen for the reconstructed video signal. The macro-block determining section determines if a macro-block represents a background area or a non-background area, based on mode information from the video decoder section and a cross correlation value between a present frame of the reconstructed video signal and a signal of a frame preceding the present frame by one frame, obtained by a first cross correlation calculator, and a cross correlation value between the present frame of the reconstructed video signal and a background video signal stored in a background memory, obtained by a second cross correlation calculator.
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Citations
4 Claims
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1. A method for detecting a video moving object comprising:
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(a) determining whether a video signal corresponding to a unit area represents a background area or a non-background area, the video signal being part of a reconstructed video signal acquired by a video decoder which decodes encoded data obtained by compression-encoding a motion video signal; (b) detecting adjacent unit areas representing the non-background area using a determination result of the determining for each unit area to determine the adjacent unit areas as an area of a moving object; (c) computing a cross correlation value between a current frame of the reconstructed video signal and a video signal preceding by one frame every unit area, (d) storing, a storage unit, a background video signal corresponding to a background component of the reconstructed video, and (e) computing a second cross correlation value between the current frame of the reconstructed video signal and the background video signal stored in the storage unit every unit area, wherein the determining (a) includes (f) determining whether the video signal in the unit area is a background area or a nonbackground area on the basis of encoding mode information obtained from the video decoder, the first cross correlation value and the second cross correlation value. - View Dependent Claims (2, 3, 4)
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Specification