Focal length estimation for panoramic stitching
US7936915B2 · kind B2 · utility
16Cited by
10References
19Claims
0Family size
Assignee
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Key dates
| Filing date | May 29, 2007 |
| Grant date | May 3, 2011 |
| Priority date | — |
| Expiry date | Feb 5, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/16
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A focal length estimation technique is presented that estimates the focal length used to capture each of a pair of overlapping images taken by a camera rotating about its center. When it is known that the focal length is the same for both images, it is estimated using just two pairs of corresponding points between the images. When it is either unknown whether the focal lengths are the same or it is known that they vary, the focal length of each image is estimated using just three pairs of corresponding points between the images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.