Multiscale adaptive system for enhancement of an image in X-ray angiography
US5963676A · kind A · utility
27Cited by
3References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1997 |
| Grant date | Oct 5, 1999 |
| Priority date | — |
| Expiry date | Feb 7, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30101
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A multi-scale approach to enhancement is taken where enhancement masks are generated at different scales and then combined together using a pyramid scheme. Each mask is computed from applying directional sensitive Laplacian kernels, which is responsible for extracting images of low contrast, followed by an adaptive non-linear mapping. This non-linearity is crucial in virtually eliminating edge overshoots. Furthermore, the input image may also be preprocessed by an edge-preserving smoothing filter to reduce the noise effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.