Hash-based media search
US10719550B2 · kind B2 · utility
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3References
27Claims
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Key dates
| Filing date | Jun 23, 2015 |
| Grant date | Jul 21, 2020 |
| Priority date | — |
| Expiry date | Dec 19, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V20/48
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of identifying an item of video content involves providing a spatial hash value and a temporal hash value for each image in a video collection. Each hash value is based on a measure of the entropy in differences between pixel values. A table of the pair of hash values against timecode is created and ordered according to one of the hash values. A search for a given pair of hash values can then be confined to that part of the table that matches the first value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.