Segmentation method for use against moving objects
US5109435A · kind A · utility
96Cited by
5References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 4, 1991 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Mar 4, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0263
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Three image frames containing an object of interest and background clutter are taken at successive time intervals and stored in memory. The background of images A, B and C are registered preferably using an area correlator 12. A median filter 16 is used to select a median value from the registered image frames. Then, subtractor 18 serves to subtract the median pixel values from one of the image frames. This difference output is then thresholded to provide a binary signal whose pixel values exceeding the threshold levels are generally associated with the position of the moving object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.