Increasing image resolution using combined differential image
US8330827B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 19, 2009 |
| Grant date | Dec 11, 2012 |
| Priority date | — |
| Expiry date | Nov 13, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/951
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for increasing the resolution of a digital image comprising: receiving an input digital image of a scene; interpolating a high-resolution image using an interpolation function; receiving a blur kernel associated with the interpolation function; initializing a candidate sharp high-resolution image; determining a plurality of differential images representing differences between neighboring pixels in the candidate sharp high-resolution image; determining a combined differential image by combining the differential images; repeatedly updating the candidate sharp high-resolution image responsive to the interpolated high-resolution image, the blur kernel, the candidate sharp high-resolution image and the combined differential image until a convergence criterion is satisfied; and storing the final candidate sharp high-resolution image in a processor-accessible memory system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.