Mitigating illumination gradients in a SAR image based on the image data and antenna beam pattern
AssigneeSandia Corporation
InventorArmin W. Doerry
Life of this patent
Estimating the term…
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.
Claims20
A method for mitigating illumination gradients in a synthetic aperture radar (SAR) image, comprising:
- providing pixel values associated with a SAR image of a target;
- determining a correction for the pixel values 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;
- and
- applying said correction to the pixel values to produce corrected pixel values.
An apparatus for mitigating illumination gradients in a synthetic aperture radar (SAR) image, comprising:
- an input for receiving pixel values associated with a SAR image of a target;
- a corrector coupled to said input and configured to determine a correction for said pixel values 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;
- and
- said corrector configured to apply said correction to the pixel values to produce corrected pixel values.
A SAR system, comprising:
- a SAR receiver configured to receive SAR signals and produce in response thereto pixel values associated with a SAR image of a target;
- an apparatus for mitigating illumination gradients in said SAR image, including an input coupled to said SAR receiver, and a corrector coupled to said input;
- said corrector configured to determine a correction for said pixel values 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;
- and
- said corrector configured to apply said correction to the pixel values to produce corrected pixel values.
Dependencies are inferred from the claim text.