Method and apparatus for enhancing signals with multiscale grouping bandelets
US8189939B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 2005 |
| Grant date | May 29, 2012 |
| Priority date | — |
| Expiry date | Mar 30, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/27
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for enhancing a d-dimensional digital signal by taking advantage of regular geometrical structures. The invention comprises a multiscale redundant grouping lifting (102), which iteratively computes grouping arrays and bandelet signals with a redundant grouping lifting. A second step makes an enhancement (103) of bandelet signals. A third step is an inverse multiscale redundant grouping lifting (104) which iteratively updates an enhanced average signal with an inverse redundant grouping lifting that takes in input enhanced bandelet signals. It outputs an enhanced signal. The invention also comprises a subband grouping bandelet enhancement which incorporates a subband decomposition and reconstruction. It includes a super-resolution process which increases the signal resolution by computing an output enhanced signal on an output sampling grid that is larger than the input sampling grid. It also includes restoration systems that invert degradation operators with grouping bandelet enhancements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.