Systems and methods for lens shading correction
US9743057B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2012 |
| Grant date | Aug 22, 2017 |
| Priority date | — |
| Expiry date | Jan 29, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/136
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for correcting intensity drop-offs due to geometric properties of lenses are provided. In one example, a method includes receiving an input pixel of the image data, the image data acquired using an image sensor. A color component of the input pixel is determined. A gain grid is determined by pointing to the gain grid in external memory. Each of the plurality of grid points is associated with a lens shading gain selected based upon the color of the input pixel. A nearest set of grid points that enclose the input pixel is identified. Further, a lens shading gain is determined by interpolating the lens shading gains associated with each of the set of grid points and is applied to the input pixel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.