Optical image processing/pattern recognition system
US4573198A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 1982 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Dec 27, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/92
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A pattern recognition and optical image processing system employing dynamically alterable magneto-optic display assemblies operating as light modulators. A first pattern is digitized and used to drive a first magneto-optic display assembly disposed in a light beam. The pattern impressed upon the light beam is sensed at the Fourier plane and digitized as a representation of the spatial filter pattern of the first pattern. A second pattern is digitized. The digitized second pattern and the digitized spatial filter pattern of the first pattern are used to drive a pair of magneto-optic display assemblies disposed in a single light beam. The resultant correlation pattern is sensed and the degree of correlation match between the Fourier transform of one pattern and the spatial filter pattern of the other pattern is used as indication of the probability of a pattern match between the first and second patterns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.