Abstract
In order to solve the clutter background problem of Synthetic Aperture Radar (SAR) image in non-uniform clutter environment, a non-parametric statistical modeling algorithm for SAR image estimation based on kN nearest neighbor estimation is proposed. The average region volume is defined, and the nearest neighbors are accurately set according to the frequency of occurrence of each observed sample value. At the same time, the average regional volume centered on the observation point is set in order to prevent the influence of extreme values. The problem that the original algorithm is incorrectly estimated, time consuming or even impossible to estimate due to the fixed number of neighbors is solved. The algorithm does not need to interfere with the prior knowledge of the target. Based on the experimental results of real SAR image data, the accuracy, robustness and simplicity of the proposed method for background clutter modeling of SAR images are verified.
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