Local feature amount calculating device, method of calculating local feature amount, corresponding point searching apparatus, and method of searching corresponding point
US8774508B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2012 |
| Grant date | Jul 8, 2014 |
| Priority date | — |
| Expiry date | May 29, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V2201/11
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A local feature amount calculating device includes a local feature amount calculating unit that acquires a local feature amount of a feature point for each pixel by giving a vote of a strength of the direction of a pixel, which is calculated by a direction strength calculating unit, to a vote cell to which a pixel of interest belongs out of vote cells of a rotated vote cell pattern that is acquired by rotating a reference vote cell pattern by an angle corresponding to a main axis direction along a corrected edge gradient direction that is acquired by correcting an edge gradient direction of the pixel that is calculated by a direction strength calculating unit in accordance with the main axis direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.