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This paper proposes a new speckle reduction algorithm for synthetic aperture radar images; it is based on the adaptive neighborhood window (ANW) and rotationally invariant block matching (RIBM). Firstly, we introduce the RIBM into the despeckling method to calculate the block matching between small patches precisely; then, aiming at the limitation of the rectangle neighborhood window (RNW), we propose...
The system of millimeter-wave synthetic aperture radar (SAR) is sensitive to the stability of aircraft, and the compensation of motion errors is the key step for high squint SAR imaging. In this paper, according to the geometric model of the high squint SAR, we analyze the impact of each component of the motion errors for high squint imaging, and deduce the formula of instantaneous Doppler chirp rate...
To efficiently preserve tiny details and sharpness information of synthetic aperture radar (SAR) images while clearly remove the speckles, an improved non-local means method is proposed. Firstly, aiming at the traditional patch-similarity measurement not precise using in SAR image, we define a new variable to obtain a more precise patch-similarity measurement results. Furthermore, the PDF mapping...
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