Discrete image data interpolation using sub-unity shift
US6687422B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2000 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Dec 1, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/4084
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for interpolating digital images is provided. An original digital image in the spatial domain is transformed into a frequency domain representation via a Fourier transform. The Fourier transform or frequency domain representation is then modified by phase shift terms corresponding to image shifts in the spatial domain with sub-unity distances matching the locations where the image values need to be restored. The original and the shifted images are then interspersed together, yielding an interpolated image. The method is particularly useful for two and three-dimensional computer tomography (CT) and magnetic resonance imaging (MRI) images, as well as other medical and non-medical digital images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.