Method and apparatus for aligning and unwarping distorted images
US8391640B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 29, 2008 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Jan 4, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for aligning and unwarping distorted images in which an initial unwarping function is applied to the coordinates of feature points of a set of input component images to generate substantially rectilinear feature points. The substantially rectilinear feature points are then used to estimate focal lengths, centers, and relative rotations for pairs of the input images. A global nonlinear optimization is applied to the initial unwarping function(s) and the relative rotations to generate optimized unwarping functions and rotations for the component images. The optimized unwarping functions and rotations may then be used to render a panoramic image, generally in the form of a spherical projection, from the input component images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.