Apparatus and method for improvement of 3D images derived from tomographic data
US4831528A · kind A · utility
54Cited by
8References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1987 |
| Grant date | May 16, 1989 |
| Priority date | — |
| Expiry date | Nov 9, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T17/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Data in tomographic images is convolved with a low-pass filter to reduce the maximum spatial frequency permitting unique mapping of surface images to a rasterized display. The filter may use linear or other weighting. Re-sampling after the filter is optional. The filtered tomographic data is employed to determine the locations and normal vectors of the surface. The locations and normal vectors employed by a computer graphics processor for applying shading in relation to the angle between the normal vector to a surface element and an operator- defined line of sight to the surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.