Efficient radial lens shading correction
US10754149B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 2018 |
| Grant date | Aug 25, 2020 |
| Priority date | — |
| Expiry date | Apr 20, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Techniques for correcting image data in a lens shading correction circuit include accessing numerical constants associated with channels of a captured image represented by a pixel array from a memory. The techniques further include calculating lens shading correction factors for the captured image for each pixel of a channel in the pixel array according to the x-y pixel position of the pixel based on a lens shading correction formula and the numerical constants. For the channel in the pixel array, the correction formula applies different subsets of the numerical constants to different radial portions of the pixel array. The techniques also includes performing lens shading correction for the captured image based on the calculated lens shading correction factors to produce corrected image data, and storing the corrected image data in a non-transitory computer-readable medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.