Method for identifying a tooth region
US8687859B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 2009 |
| Grant date | Apr 1, 2014 |
| Priority date | — |
| Expiry date | Jul 12, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30036
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for identifying tooth regions. The method includes generating a first threshold image from a first tooth image by selecting intensity data values higher than a first predetermined threshold value c1; generating a second threshold image from a second tooth image by selecting intensity data values higher than a second predetermined threshold value c2; generating a preliminary tooth regions image that defines at least a first tooth region from the intersection of the first and second threshold images; generating a reference binary image from the first image by selecting intensity data values higher than a third predetermined threshold value c3, wherein threshold value c3 exceeds c1; and generating a refined tooth regions image from at least the first tooth region in the preliminary tooth regions image. The first tooth region is connected to objects in the reference binary image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.