Creation of hierarchical dictionary
US10248666B2 · kind B2 · utility
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15Claims
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Key dates
| Filing date | Apr 30, 2013 |
| Grant date | Apr 2, 2019 |
| Priority date | — |
| Expiry date | Dec 28, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/90
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of creating a hierarchical dictionary comprises, with a processor, extracting a number of symbols from a first image, constructing a number of refinement dictionary entries based on the symbols, the refinement dictionary entries forming a refinement dictionary, grouping a number of the refinement dictionary entries into clusters to form a number of refinement dictionary entry clusters, and constructing a number of direct dictionary entries for each of the refinement dictionary entry clusters, the direct dictionary entries forming a direct dictionary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.