Scale-based image filtering of magnetic resonance data
US6885762B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2001 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Jul 10, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20192
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The invention provides novel scale-based filtering methods that use local structure size or “object scale” information to arrest smoothing around fine structures and across even low-gradient boundaries. One method teaches a weighted average over a scale-dependent neighborhood; while another employs scale-dependent diffusion conductance to perform filtering. Both methods adaptively modify the degree of filtering at any image location depending on local object scale. This permits a restricted homogeneity parameter to be accurately used for filtering in regions with fine details and in the vicinity of boundaries, while at the same time, a generous filtering parameter is used in the interiors of homogeneous regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.