Demodulation and phase estimation of two-dimensional patterns
US7444032B2 · kind B2 · utility
4Cited by
8References
17Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 19, 2006 |
| Grant date | Oct 28, 2008 |
| Priority date | — |
| Expiry date | Jun 3, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20056
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method (100) of demodulating a real two-dimensional pattern (110) is disclosed. The method (100) estimates (120, 130) a quadrature two-dimensional pattern from the real two-dimensional pattern (110) using a smooth phase only transform having an anti-symmetric phase, such as a spiral phase filter (140). A demodulated image is created by combining (180) the real two-dimensional pattern (110) and the estimated quadrature two-dimensional pattern.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.