Signal processing in barcode reading with a wavelet transformation
US7526130B2 · kind B2 · utility
3Cited by
6References
8Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 18, 2005 |
| Grant date | Apr 28, 2009 |
| Priority date | — |
| Expiry date | Jan 24, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2218/06
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for processing a digital signal obtained in a barcode reading operation comprises a step of applying a wavelet transformation to the digital signal. The noise threshold at each level of the wavelet transformation is determined from a total transfer function in the analogue processing stage, and the coefficients are set to be zero if less than the noise threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.