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- 2018
一种使用剪切波变换的干涉图滤波算法
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Abstract:
干涉图小波阈值法滤波未考虑干涉相位统计特性，导致在低相干区域得到的滤波效果不能令人满意。针对这一问题，提出了一种剪切波变换与干涉相位标准差相结合的相位滤波算法。该算法将干涉相位统计特性与剪切波阈值滤波结合起来，利用相位标准差改正滤波阈值以提高滤波效果。此外，为了评价干涉图的滤波效果并为实测数据选择合适的滤波方法提供参考，将模拟干涉图解缠结果的局部均方差分布作为滤波质量评价指标。将此算法与Goldstein滤波、小波滤波、最优方向融合滤波和剪切波软阈值滤波进行比较，结果表明所提算法能更有效地削弱干涉图噪声，同时保留干涉图的细节信息，避免了低相干地区弱滤波问题
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