Generation of video hash
US11341747B2 · kind B2 · utility
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4References
20Claims
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Inventor
Key dates
| Filing date | Sep 14, 2020 |
| Grant date | May 24, 2022 |
| Priority date | — |
| Expiry date | Sep 14, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4307
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method are providing for generating a hash in video in which a sample series of temporal difference are sampled in an image order. A temporal averaging is performed and a rate of change is detected to identify as distinctive events regions of high rate of change. Images having a distinctive event are labelled as distinctive images. For each image, the temporal spacing in images is calculated between that image and other distinctive images to provide a set of temporal spacings for that image; and a hash is derived for that image from that set of temporal spacings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.