Method for computing a unique identifier for a gemstone having facets
US10489647B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 11, 2018 |
| Grant date | Nov 26, 2019 |
| Priority date | — |
| Expiry date | Jun 23, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V20/66
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to method for computing a unique identifier for a gemstone, including acquiring a 2D digital master image of the gemstone, where an image of a reference mark on the gemstone defines a master image referential; matching a virtual selection mask with the master image according to a predefined position and orientation with respect to the master image referential; defining, in the master image, a plurality of distinct selected zones corresponding to the location of selection zones of the matched mask; detecting, in each of the plurality of distinct selected zones, the presence or not of at least one facet edge portion image; defining a location of the detected facet edge portion images in the master image; and computing a unique identifier based on the defined locations of the detected facet edge portion images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.