Method for detecting a moving object in motion video and apparatus
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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.
15 Citations
16 Claims
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1-9. -9. (Cancelled)
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10. A video moving object detecting apparatus comprising:
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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 a video decoder which decodes encoded data obtained by compression-encoding a motion video signal;
a detection unit configured to detect adjacent unit areas representing the non-background area using a determination result of the determination unit for each unit area to determine the adjacent unit areas as an area of a moving object, a first 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 unit configured to store a background video signal corresponding to a background component of the reconstructed video; and
a second 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 unit every unit area;
wherein the determining unit includes a section which determines 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 (13, 14, 15)
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11-12. -12. (Cancelled)
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16-20. -20. (Cancelled)
Specification