A Reflection Symmetric Target Extraction Method Based on Hypothesis Testing for PolSAR Calibration
نویسندگان
چکیده
Polarimetric calibration is indispensable to quantitatively apply and analyze the polarimetric synthetic aperture radar (PolSAR) image. At present, methods relying on assumption of reflection symmetry have been widely used, which need extract reference targets that meet assumptions before then calculate cross-pol channel imbalance crosstalk errors. However, distortion in uncalibrated image will affect calculation polarization features, resulting inaccurate target extraction results. Consequently, we proposed a symmetric method combines with spatial statistics information. The first takes initial result based power total Span introduces hypothesis testing judge homogeneous samples. Finally, automatically threshold by Otsu algorithm achieve high-precision targets. Meanwhile, carried out experiments real C- X-band airborne PolSAR data conducted qualitative quantitative evaluation analysis experimental studies demonstrated that, compared classical approaches, approach further improved accuracy extracting more accurate
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ژورنال
عنوان ژورنال: Remote Sensing
سال: 2023
ISSN: ['2315-4632', '2315-4675']
DOI: https://doi.org/10.3390/rs15051252