Image dissecting document verification system
US4811408A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1987 |
| Grant date | Mar 7, 1989 |
| Priority date | — |
| Expiry date | Nov 13, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/125
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A document identification system incorporating an identification card bearing image indicia that is sensed and tested for comparison with reference data. The image indicia on the card, e.g. a photographic likeness of the card assignee, is dissected to provide representative pixel data. Individual image pixel representations are quantized, digitized and stored in an escort memory, e.g. a magnetic stripe on the card. The card is verified by again sensing the image indicia and processing the data as before. The resultant test data is correlated with the reference data from the escort memory. The composite indication of the correlation is manifest as an acceptance or a rejection and also as a two-dimensional binary display (black or white pixel areas) to reveal an analysis of the correlation for manual interpretation. The display is variable for different levels of detail.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.