Signal processors and methods for estimating transformations between signals with least squares
US11410262B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2019 |
| Grant date | Aug 9, 2022 |
| Priority date | — |
| Expiry date | Jul 29, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/754
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Signal processing devices and methods estimate transforms between signals using a least squares technique. From a seed set of transform candidates, a direct least squares method applies a seed transform candidate to a reference signal and then measures correlation between the transformed reference signal and a suspect signal. For each candidate, update coordinates of reference signal features are identified in the suspect signal and provided as input to a least squares method to compute an update to the transform candidate. The method iterates so long as the update of the transform provides a better correlation. At the end of the process, the method identifies a transform or set of top transforms based on a further analysis of correlation, as well as other results.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.