SAR image sidelobe suppression method and device, electronic equipment and storage medium
A sidelobe suppression, image technology, applied in the field of image processing, can solve the problems of poor sidelobe suppression and limited performance of SAR image sidelobe suppression, to achieve the effect of filtering noise and improving image quality
Pending Publication Date: 2022-05-10
BEIHANG UNIV
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However, the sidelobe suppression performance of these methods for SAR images is limited, the sidelobe suppression effect is not good, and there is still a lot of room for improvement in the quality of the processed image.
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[0057] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the protection of the present invention. scope.
[0058] As mentioned above, currently commonly used SAR image sidelobe suppression methods mainly include frequency domain weighting method, apodization filtering method and spatial apodization method (Spatially Variant Apodization, SVA). Among them, the frequency-domain weighting method is the windowing method. By applying different weighting functions ...
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The embodiment of the invention relates to the technical field of image processing, in particular to an SAR image sidelobe suppression method and device, electronic equipment and a storage medium. The method comprises the following steps: calculating a two-dimensional PSF estimation matrix of an SAR image to be processed; based on the two-dimensional PSF matrix and related parameters of the SAR image to be processed, solving a deconvolution function, and outputting a deconvolution result; wherein the deconvolution result can be restored into an SAR image after side lobe suppression, the related parameters comprise the number of azimuth sampling points, the number of range sampling points, a phase error coefficient, the size of a fuzzy kernel, a penalty parameter, a balance constant and the maximum number of iterations of the SAR image to be processed, the azimuth is the direction of a radar flight orbit, and the balance constant is the maximum number of iterations of the SAR image to be processed. The distance direction is the direction of radar wave emission. The sidelobe suppression method for the SAR image provided by the invention is good in sidelobe suppression performance, and can effectively filter noise and improve the quality of the image.
Description
technical field [0001] The present invention relates to the technical field of image processing, in particular to a sidelobe suppression method, device, electronic equipment and storage medium for SAR images. Background technique [0002] Sidelobe suppression is an important problem in traditional synthetic aperture radar image processing. Synthetic aperture radar obtains two-dimensional high-resolution images through range-oriented pulse compression technology and azimuth synthetic aperture technology. However, due to the limited distribution of the spectral support domain of the echo signal received by the SAR system, the Point Spread Function (PSF) of the SAR image is a Sinc function in both the range direction and the azimuth direction, and there are non-negligible side lobes. [0003] In SAR images, strong targets, such as buildings and metal objects, not only have strong main lobe energy, but also have high side lobe energy, which easily exceeds the main lobe energy o...
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IPC IPC(8): G01S13/90G01S7/28
CPCG01S13/9021G01S7/2813
Inventor 杨威刘艳芳陈杰李春升曾虹程
Owner BEIHANG UNIV