Characterization of corners of curvilinear segment
US6072502A · kind A · utility
72Cited by
2References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 25, 1997 |
| Grant date | Jun 6, 2000 |
| Priority date | — |
| Expiry date | Jun 25, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/44
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system determines discontinuities on a drawn curve. Local tangent values for a curvilinear segment are generated by determining the most likely tangent value for all points on the segment and by acting on a sampling of points around the current point whose tangent is to be determined. A robust statistical estimator is then applied to all angle values generated for the sample set to determine the likely intended tangent direction of the current focal point. The system then selects points with significant changes in tangent values to determine curve discontinuities such that the corners of the segment can be derived.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.