Local image descriptors
US7970226B2 · kind B2 · utility
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12References
20Claims
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Key dates
| Filing date | Apr 23, 2007 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Feb 27, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/462
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A local image descriptor generation technique that produces a descriptor for an image patch is presented. The technique generally involves smoothing the pixels of the image patch, followed by employing a transformation to produce a transform vector for each of a set of sample points spaced across the image patch. The transform vectors are weighted and spatially accumulated to produce a prescribed number of linearly summed vectors. The linearly summed vectors are concatenated to form a raw local image descriptor, which is normalized to produce a finalized descriptor for the image patch.
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