Mitigating illumination gradients in a SAR image based on the image data and antenna beam pattern

DWPI Title: Method for mitigating illumination gradients in synthetic aperture radar (SAR) image, involves determining correction of pixel values based on information indicative of beam pattern used by SAR antenna apparatus to illuminate target
Abstract: Illumination gradients in a synthetic aperture radar (SAR) image of a target can be mitigated by determining a correction for pixel values associated with the SAR image. This correction is determined based on information indicative of a beam pattern used by a SAR antenna apparatus to illuminate the target, and also based on the pixel values associated with the SAR image. The correction is applied to the pixel values associated with the SAR image to produce corrected pixel values that define a corrected SAR image.
Use: Method for mitigating illumination gradients in synthetic aperture radar (SAR) image, used in SAR system (claimed).
Advantage: The synthetic beam pattern can be formed effectively with high azimuth resolution. The pixel value correction operation can be performed to easily mitigate the illumination gradients present in the original SAR image. The brightness of the SAR image can be improved.
Novelty: The method involves providing pixel values associated with a SAR image of a target. The correction of the pixel values is determined based on the information indicative of a beam pattern used by a SAR antenna apparatus to illuminate the target based on pixel values. The correction is applied to the pixel values to produce the corrected pixel values.
Filed: 12/4/2006
Application Number: US2006566531A
Tech ID: SD 10325.0
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.
Data from Derwent World Patents Index, provided by Clarivate
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