Dynamic logic algorithm used for detecting slow-moving or concealed targets in synthetic aperture radar (SAR) images
US6911933B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 14, 2004 |
| Grant date | Jun 28, 2005 |
| Priority date | — |
| Expiry date | Jun 5, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/887
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention includes an application of a dynamic logic algorithm to detect slow moving targets. Show moving targets are going to be moving in the range from 0-5 mph. This could encompass troop movements and vehicles or convoys under rough terrain. The method can be defined as a seven step process of detecting slow moving targets using a synthetic aperture radar (SAR), said slow moving targets being objects of interest that are moving in the range from 0-5 mph, wherein this method is composed of the steps of receiving SAR signal history data having an SAR image; assuming a presence of slow moving target in a SAR image based-on range, cross-range position, and velocity; assuming a presence of clutter; assigning target and clutter models that are probability distribution functions (pdf) that are defined to account for every pixel in the SAR image, wherein the target is modeled using a sum of Gaussians fitted along the target shape model, while the clutter is modeled with a uniform distribution; computing a “target present” predetermined threshold value; converging the target model to a minimum variance value; and comparing the target model minimum variance value to the prede…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.