Image interpolation method and device based on autoregressive model
US9672590B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 6, 2013 |
| Grant date | Jun 6, 2017 |
| Priority date | — |
| Expiry date | May 13, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20224
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image interpolation method and device based on an autoregressive model. The method first, interpolating a low-resolution image up to a target scale to obtain an interpolated image M; determining a local area W in the image M to be interpolated, establishing two autoregressive models for each pixel point in the local area W except for the edge pixel points, and determining an initial objective function F0 according to the autoregressive models; down sampling the local area W except for the edge pixel points to the same size as the low-resolution image to obtain a local area W′, subtracting a corresponding area in the low-resolution image from W′ one pixel value by one pixel value, and adding the result to the initial objective function F0 to obtain an objective function F; performing iteration on the objective function F to obtain a pixel point value of a center block of W.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.