Anisotropic texture filtering using weights of an anisotropic filter that minimize a cost function
US12387416B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 21, 2024 |
| Grant date | Aug 12, 2025 |
| Priority date | — |
| Expiry date | May 21, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T15/503
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of performing anisotropic texture filtering includes generating one or more parameters describing an elliptical footprint in texture space; performing isotropic filtering at each sampling point of a set of sampling points in an ellipse to be sampled to produce a plurality of isotropic filter results, the ellipse to be sampled based on the elliptical footprint; selecting, based on one or more parameters of the set of sampling points and one or more parameters of the ellipse to be sampled, weights of an anisotropic filter that minimize a cost function that penalises high frequencies in the filter response of the anisotropic filter under a constraint that the variance of the anisotropic filter is related to an anisotropic ratio squared, the anisotropic ratio being the ratio of a major radius of the ellipse to be sampled and a minor axis of the ellipse to be sampled; and combining the plurality of isotropic filter results using the selected weights of the anisotropic filter to generate at least a portion of a filter result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.