Signal train verification system using landmarks
US4190820A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1978 |
| Grant date | Feb 26, 1980 |
| Priority date | — |
| Expiry date | Apr 21, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/30
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
When trains of signals, derived from a written template signature, are to be compared directly with trains of signals, derived from a written specimen signature, because no two written signatures are identical, there is a requirement for providing a certain degree of "rubberiness" between the specimen and template signals. Previously, such rubberiness was achieved by breaking up the trains of signals into fixed portions and then conducting translation, stretch and contraction between these fixed portions in the course of the comparison. In this invention, advantage is taken of the existence of prominent landmarks in the trains of signals of the template and specimen signatures. The trains of signals are broken into segments by these landmarks. Segments of the specimen are stretched or contracted and translated to match corresponding segments of the template, to greatly simplify and enhance correlation process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.