Method and system for interpolator direction selection during edge detection
US7412096B2 · kind B2 · utility
16Cited by
5References
19Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 21, 2004 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Apr 24, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/142
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method that determines the direction of an edge in a video image using a gradient of the edge in a first direction and a gradient of the edge in a second direction. The system uses the sign of the product of the gradient in the first direction and the gradient in the second direction along with a ratio of multiples of the two gradients to determine the direction of the edge. The direction may correspond to an angle range, where the ratio of the gradients corresponds to a trigonometric function of the angle of the edge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.