Reduced-bias multi-resolution coherent change detection
| DWPI Title: Computing device for generating reduced bias multi-resolution (RBMR) coherent change detection (CCD) image product, has pixel of RBMR CCD image has value that computed using respective box titter size assigned to pixel |
| Abstract: Described herein are various technologies relating to generating a reduced bias multi-resolution (RBMR) coherent change detection (CCD) image product. A low bias, low resolution (LBLR) CCD image product is generated based upon a first SAR image of a scene and a second SAR image of the scene, where each pixel in the LBLR CCD image has a respective value that is computed using a large box-filter. The LBLR CCD image is segmented into a plurality of segments, and a box-filter size is determined for each segment based upon values of pixels in the segment. A RBMR CCD image product is then computed using box-filters of the determined sizes. |
| Use: Computing device for generating RBMR CCD. |
| Advantage: The LBLR CCD image product is segmented into several segments through utilization of a suitable segmentation algorithm, where the segmentation automatically separate low coherence regions from high coherence regions in the LBLR CCD image product. The regions estimated to be high coherency regions are maintained, while the salt and pepper corresponding to bias in low coherency regions is reduced or eliminated in the RBMR CCD image product. The CCD image former component generates the RBMR CCD image product using different box-filter sizes for different pixels, with smaller box-filter sizes for regions of high coherency and larger box-filter sizes for regions of low coherency. |
| Novelty: The computing device (145) has CCD image is segmented into the several segments based upon the values of the pixels of the CCD image. The several box filter sizes for the several segments of the CCD image are identified such that each pixel of the CCD image is assigned a respective box filter size. The several box filter sizes are identified based upon the values of the pixels of the CCD image. A RBMR CCD image is generated which comprises computing the sample correlation of the product of the first synthetic aperture radar (SAR) image (170) with the complex-conjugate of the second SAR image (172). A pixel of the RBMR CCD image has a value that is computed using the respective box titter size assigned to the pixel. |
| Filed: 12/2/2015 |
| Application Number: US14957393A |
| Tech ID: SD 13015.0 |
| 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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