Methods and apparatus for altering spatial characteristics of a digital image
US6101235A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1998 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | May 27, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/4007
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention, in one form, includes methods and apparatus for altering the spatial characteristics of a digital image collected in a CT system using a real-time magnification algorithm. In accordance with one embodiment of the algorithm, once the digital image is collected, an enlarged image is generated by interpolating and filtering the original digital image data. In one aspect, two pass linear interpolation and one dimensional filtering is utilized to generate the enlarged image. The first pass performs interpolation in the x direction and the second pass performs interpolation in the y direction. The interpolations in the x and y directions are performed in two steps. Initially, linear interpolation is applied to the original digital image to generate interpolated data. A one dimensional convolution filter is then applied to the interpolated data. Utilizing this process, a high quality enlarged image may be generated for any integer zoom factor. In another aspect of the present invention, a two step procedure of interpolation and two dimensional filtering is utilized. The first step performs bilinear interpolation of the digital image to generate interpolated data. Th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.