Edge detection technique having improved feature visibility
US8300949B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 2010 |
| Grant date | Oct 30, 2012 |
| Priority date | — |
| Expiry date | Apr 28, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/13
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for determining edge features of an image comprising filtering at least a portion of the image to attenuate high frequency signals of the image to an extent greater than low frequency signals of the image. Performing a one-dimensional search in a two different horizontal directions relative to a particular pixel of the image to determine horizontal direction local maximums. Calculating a horizontal gradient based upon the horizontal direction local maximums. Performing a one-dimensional search in a two vertical horizontal directions relative to a particular pixel of the image to determine vertical direction local maximums. Calculating a vertical gradient based upon the vertical direction local maximums. Calculating a gradient for the particular pixel based upon the horizontal gradient and the vertical gradient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.