Descriptor for spatial distribution of motion activity in compressed video
US6600784B1 · kind B1 · utility
62Cited by
7References
15Claims
0Family size
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Key dates
| Filing date | Feb 2, 2000 |
| Grant date | Jul 29, 2003 |
| Priority date | — |
| Expiry date | Feb 2, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20021
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method describes motion activity in a video sequence. A motion activity matrix is determined for the video sequence. A threshold for the motion activity matrix is determined. Connected regions of motion vectors at least equal to the threshold are identified and measured for size. A histogram of the distribution of the sizes of the connected areas is constructed for the entire video sequence. The histogram is normalized to characterize the spatial distribution of the video sequence in a motion activity descriptor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.