Method for detecting a moving object in motion video and apparatus therefor
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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.
14 Citations
20 Claims
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1-17. -17. (Cancelled)
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18. A video moving object detecting apparatus comprising:
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a video decoder which decodes encoded data obtained by compression-encoding a motion video signal;
a determination unit configured to determine 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 the video decoder;
a detection unit configured to detect an area of a moving object from a result of the determination done by the determination unit for each unit area;
a display which displays information indicating the area of the moving object, determined by the determination unit, on a display screen for the reconstructed video signal;
a first cross correlation calculator which computes a cross correlation value between a current frame of the reconstructed video signal and a video signal preceding by one frame every unit area;
a storage section which stores a background video signal corresponding to a background component of the reconstructed video; and
a second cross correlation calculator which computes a second cross correlation value between the current frame of the reconstructed video signal and the background video signal stored in the storage section every unit area;
wherein the determination unit is configured to determine whether the video signal in the unit area is a background area or a non-background area on the basis of encoding mode information obtained from the video decoder section, the first cross correlation value and the second cross correlation value. - View Dependent Claims (19)
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20. (Cancelled)
Specification