Optical detection of geometric configurations
US4118107A · kind A · utility
9Cited by
1References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1966 |
| Grant date | Oct 3, 1978 |
| Priority date | — |
| Expiry date | Jan 19, 1986 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/895
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The specification discloses an optical technique for retrieving images of geometric shapes from a cluttered background in a photographic record by means of amplitude and phase filters configured according to the particular shape sought to be retrieved. A Fourier transform of the record is filtered with filters of both types and light representing the desired shape, if present, is brought to a focus in an image plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.