Pattern recognition apparatus
US4015240A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1975 |
| Grant date | Mar 29, 1977 |
| Priority date | — |
| Expiry date | Feb 12, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C9/37
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A pattern recognition apparatus for recognizing or identifying fingerprint images and the like is described. The apparatus enables the determination of the coordinates and angular positions of characteritic points such as fingerprint minutiae. The pattern recognition apparatus includes a high resolution scanner for scanning a fingerprint impression or image, an analog to digital converter to convert the scanner signals to a digitally encoded image having many levels of gray scale data, an image enhancer to eliminate imperfections in the imagery, pre-editing circuits to edit out areas of the image which should not be further processed, a minutiae detection system having high redundancy to reduce the probability of missed minutiae, and a post-editing subsystem to eliminate false minutiae detections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.