Adaptive image acquisition system
US4949391A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1987 |
| Grant date | Aug 14, 1990 |
| Priority date | — |
| Expiry date | May 8, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/04787
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An adaptive image acquisition system employing a hand-held optical scanner or camera is disclosed. The system includes an adaptive camera exposure control system to adjust the camera exposure time to the media's reflectivity characteristics. The system assembles a "filmstrip" of images from compressed video data, wherein redundant image data appearing in successive image frames has been removed. The system employs a correlation process between successive frames to identify the redundant frame information and determined the camera velocity. By adapting the correlation process to the velocity of the camera, the effects of variations in the velocity may be substantially eliminated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.