Method and apparatus for removing general lens distortion from images
US8265422B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 20, 2009 |
| Grant date | Sep 11, 2012 |
| Priority date | — |
| Expiry date | Jun 24, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T5/80
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for removing general geometric lens distortion from images. A geometric distortion removal algorithm is implemented according to a general 5-parameter distortion model that includes both radial and tangential lens distortion components. The algorithm may be implemented in a two-stage process in which one-dimensional elements in one planar dimension (rows or columns) of an input image with geometric distortion are rendered to generate an intermediate buffer, and then one-dimensional elements in the other planar dimension (columns or rows) of the intermediate buffer are rendered to generate an output image with geometric distortion reduced or removed. Thus, one-dimensional sampling is performed, and interpolation is performed in one planar dimension, rather than 2-D interpolation. An input row or column may be decimated, if necessary, before row or column interpolation is performed to generate an output row or column. Since decimation is performed in one dimension, aliasing artifacts may be prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.