Method and system for identifying an edge in an image
US8971637B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 2012 |
| Grant date | Mar 3, 2015 |
| Priority date | — |
| Expiry date | Jan 6, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/13
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for identifying an edge in a portion of an image, the portion having an associated intensity variation. An edge candidate is detected at a local extremum of the intensity variation (i.e. at a position along the x-axis that corresponds to a peak or valley of the intensity variation). A local threshold associated with the edge candidate is computed on the basis of a slope tolerance and the slope value of the edge candidate, where this local threshold defines a boundary region for the edge candidate. If the edge candidate is determined to be a global extremum (i.e. the highest peak or lowest valley) within its respective boundary region, the edge candidate is verified as being an actual edge of the image portion. Identification of this verified edge may include determination of one or more of a plurality of characteristics of the edge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.