Apparatus, system and method for highlighting anomalous change in multi-pass synthetic aperture radar imagery
| DWPI Title: System for highlighting anomalous change in multi-pass synthetic aperture radar imagery has statistically-normalized coherence image of scene that is created based on coherency change detection and statistically-normalized coherence images |
| Abstract: Described herein are various technologies relating to constructing a statistically-normalized coherence (SNC) image. A plurality of synthetic aperture radar (SAR) images of a scene are generated based upon radar signals directed towards and reflected off of the scene, and a plurality of coherence change detection (CCD) images of the scene are generated based upon the SAR images. The CCD images are registered with one another, and mean and variance are computed on a pixel-wise basis. A new CCD image is subsequently received, and registered with the plurality of CCD images. The SNC image is generated based upon the computed mean and variance values for each pixel in the registered CCD images, and further based upon values of pixels in the new CCD image. The SNC image identifies locations in the scene where anomalous activity is represented in the new CCD image. |
| Use: System for highlighting anomalous change in multi-pass synthetic aperture radar imagery. |
| Advantage: The statistically-normalized coherence image is designed to identify locations in a scene where unexpected change has occurred and/or where expected change has not occurred, then an analyst, when reviewing this image, may be able to relatively quickly determine whether further investigation is necessary as to activity or lack of activity in the scene. The statistically-normalized coherence image fails to include clutter associated with corresponding coherency change detection images of the scene, which allows the analysts to quickly understand areas of the scene that are of interest to the analyst. |
| Novelty: The system (100) has processor that creates a statistically-normalized coherence image of the scene (102) based upon the coherency change detection images and statistically-normalized coherence image, in which each pixel in the statistically-normalized coherence image is assigned a respective value based upon values assigned to pixels in the coherency change detection images that represent the same location in the scene as the pixel, and causing the statistically-normalized coherence image image to be displayed on a display of an analyst. |
| Filed: 11/14/2017 |
| Application Number: US15812238A |
| Tech ID: SD 13647.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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