Spatial symmetry cueing image processing method and apparatus
US5020111A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 14, 1988 |
| Grant date | May 28, 1991 |
| Priority date | — |
| Expiry date | Oct 14, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V10/88
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical correlation method and apparatus recognizes and locates specific patterns in a scene based on the spatial symmetries associated with that pattern. An input scene is divided into two identical scenes, one of which plays the role of the input scene and the other the role of the filter scene. The filter image is passed through a spatial operator before being sent, along with the input image, to a real-time correlator. The real-time output from the correlator is compared to the input scene. Bright spots or regions in the correlation image represent objects with symmetry. This technique does not depend on comparison of the received image with a standard or stored image, consequently, it overcomes the traditional handicap of sensitivity to both the aspect and range of the viewer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.