Apparatus for identifying an individual based on a fingerprint image
US5815598A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 19, 1997 |
| Grant date | Sep 29, 1998 |
| Priority date | — |
| Expiry date | Nov 19, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/92
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In an individual identification apparatus, a hologram 11 recorded on a card is irradiated with laser light to read out a fingerprint image of a specific person. A finger of an arbitrary person to be identified with the specific person is irradiated with laser light to obtain a fingerprint image. Thus obtained fingerprint images are jointly written in a first SLM. Then, the joint image is read out and Fourier transformed to obtain a Joint Fourier Transform image, which is then written in a second SLM. The Joint Fourier Transform image is then read out and Fourier transformed to obtain a pair of output correlation peaks. A photodetector detects the intensity of the output correlation peaks and outputs a signal indicative of the intensity. A threshold processor compares the value of the signal with a predetermined threshold value to positively or negatively identify the arbitrary person with the specific person.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.