Methods and apparatuses for refining a geometric description of an object having a plurality of extensions
US6526165B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1998 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | Nov 30, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30141
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus are disclosed for refining a rough geometric description (GD) and a rough pose of an object having extensions. The invention locates anchor points within an image of the object and uses the anchor points to align in at least one dimension the rough GD. In one embodiment, the anchor points are the tips of the extensions of the object; the rough GD of the object is then aligned along the angular orientation indicated by the tips. Thereafter, other dimensions of the rough GD and the rough pose are measured, measuring the dimensions having less unknowns first. The rough GD and the rough pose are then updated to provide the refined GD and refined pose. For one measurement, an extent of a region is measured using the expected area of region to threshold the region and segment it from the remainder of the image before measuring the extent of the region. An application of refining a GD of a leaded object is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.