Method and system for fast and robust identification of specific product images
US9042659B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 2011 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | Sep 24, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/753
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Identification of objects in images. All images are scanned for key-points and a descriptor is computed for each region. A large number of descriptor examples are clustered into a Vocabulary of Visual Words. An inverted file structure is extended to support clustering of matches in the pose space. It has a hit list for every visual word, which stores all occurrences of the word in all reference images. Every hit stores an identifier of the reference image where the key-point was detected and its scale and orientation. Recognition starts by assigning key-points from the query image to the closest visual words. Then, every pairing of the key-point and one of the hits from the list casts a vote into a pose accumulator corresponding to the reference image where the hit was found. Every pair key-point/hit predicts specific orientation and scale of the model represented by the reference image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.