System and method for image upsampling using natural image statistics of first and second derivatives
US8369653B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 2009 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Oct 9, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/40
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for upsampling input images may evaluate potential upsampling solutions with respect to an objective function that is dependent on a sparse derivative prior on second derivative(s) of the potential upsampling solutions to identify an acceptable higher-resolution output image. The objective function may also be dependent on fidelity term(s) and/or sparse derivative prior(s) on first derivative(s) of potential upsampling solutions. The methods may include applying the iteratively re-weighted least squares procedure in minimizing the objective function and generating improved candidate solutions from an initial solution. The identified solution may be stored as a higher-resolution version of the input image in memory, and made available to subsequent operations in an image editing application or other graphics application. The methods may produce sharp results that are also smooth along edges. The methods may be implemented as program instructions stored on computer-readable storage media, executable by a CPU and/or GPU.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.