Multiscale modulus filter bank and applications to pattern detection, clustering, classification and registration
US8953875B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 26, 2011 |
| Grant date | Feb 10, 2015 |
| Priority date | — |
| Expiry date | Sep 10, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/52
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A digital filter bank having a number J≧1 of stages is disclosed. For each integer j such that 1≦j≦J, the j-th stage includes a plurality of filtering units (20, 21) each receiving an input signal of the j-th stage. These filtering units include a low-pass filtering unit (20) using real filtering coefficients and at least one band-pass filtering unit (21) using complex filtering coefficients. Following each band-pass filtering unit of the j-th stage, a respective modulus processing unit (25) generates a processed real signal as a function of squared moduli of complex output values of the band-pass filtering unit. The input signal of the first stage is a digital signal supplied to the digital filter bank, while for 1<j≦J, the input signal of the j-th stage includes the processed real signal generated by at least one modulus processing unit of the (j−1)-th stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.