Efficient lens re-distortion
US9818201B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 2014 |
| Grant date | Nov 14, 2017 |
| Priority date | — |
| Expiry date | Dec 23, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/81
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and systems efficiently apply known distortion, such as of a camera and lens, to source image data to produce data of an output image with the distortion. In an embodiment, an output image field is segmented into regions so that on each segment the distortion function is approximately linear, and segmentation data is stored in a quadtree. The distortion function is applied to the segmented image field to produce a segmented rendered distortion image (SRDI) and a corresponding look-up table. To distort a source image, a location in the output image field is selected, and the uniquely colored segment at the same location in the SRDI is found. The look-up table provides the local linear inverse of the distortion function, which is applied to determine from where in the source image to take image texture data for the distorted output image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.