Compensating for variation in microlens position during light-field image processing
US8831377B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2013 |
| Grant date | Sep 9, 2014 |
| Priority date | — |
| Expiry date | Mar 4, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N17/002
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Light-field image data is processed in a manner that reduces projection artifacts in the presence of variation in microlens position by calibrating microlens positions. Initially, approximate centers of disks in a light-field image are identified. Gridded calibration is then performed, by fitting lines to disk centers along orthogonal directions, and then fitting a rigid grid to the light-field image. For each grid region, a corresponding disk center is computed by passing values for pixels within that grid region into weighted-center equations. A displacement vector is then generated, based on the distance from the geometric center of the grid region to the computed disk center. For each grid region, the final disk center is computed as the vector sum of the grid region's geometric center and displacement vector. Calibration data, including displacement vectors, is then used in calibrating disk centers for more accurate projection of light-field images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.