Identifying shapes in an image by comparing Bézier curves
US9741133B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2015 |
| Grant date | Aug 22, 2017 |
| Priority date | — |
| Expiry date | Oct 22, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/471
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure is directed to identifying shapes in an image. For example, a shape identification system may identify an unknown shape represented by a Bézier path that has at least one Bézier curve. The shape identification system may also identify a stored Bézier path that has at least one stored Bézier curve, for example, in a database of known shapes. Using the Bézier curve of the unknown shape and the stored Bézier curve of the known shape, the shape identification system can determine a transformation matrix that transforms the transforms the Bézier curve of unknown shape to the stored Bézier curve of the known shape. Then, the shape identification system can compare the transformed Bézier curve to the stored Bézier curve to determine whether the unknown shape matches the known shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.