Apparatus, system and method for highlighting activity-induced change in multi-pass synthetic aperture radar imagery
| DWPI Title: System for highlighting activity-induced change in multi-pass synthetic aperture radar imagery for constructing differenced change product (DCP) image, has processor that generates and displays DCP image of scene on display of analyst |
| Abstract: Described herein are various technologies relating to constructing a differenced change product (DCP) 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 their pixel values re-scaled according to a monotonic mapping function. The DCP image is generated based upon a computed pixel-wise difference between a pair of the re-scaled CCD images. The DCP image identifies locations in the scene where human activity-induced change is likely to have occurred between a pair of SAR passes of the scene. |
| Use: System for highlighting activity-induced change in multi-pass synthetic aperture radar imagery for constructing DCP image. |
| Advantage: The DCP image allows the analyst to quickly understand areas of the scene that are of interest to the analyst. |
| Novelty: The system has a radar system that comprises a transmitter (108) to emit radar signals and a receiver (112) to detect radar signals (114). A processor generates a three synthetic aperature radar (SAR) images of a scene (102). The first and second coherent change detection (CCD) images of the scene are generated based upon the three SAR images. The DCP image of the scene is generated based upon the CCD images in which the DCP image comprises pixels that represent locations in the scene such that each pixel in the DCP image is assigned a respective value based upon values assigned to pixels in the CCD images that represent the same location in the scene as the pixel, and further a first pixel in the pixels of the DCP image that represents a first location in the scene is assigned a first value that indicates that change that has occurred at the first location in the scene is activity-induced change. The DCP image is caused to be displayed on a display of an analyst. |
| Filed: 3/27/2018 |
| Application Number: US15936806A |
| Tech ID: SD 13652.0 |
| 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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