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冰川边界提取是冰川变化监测的一个重要参数,光学冰川遥感方法可以有效、精确的提取出无云区域冰川的边界信息,但是,对于有云区域和天气状况不好的冰川区域却很难获取冰川的边界信息.提出了一种基于SAR干涉失相干特性的提取冰川边界信息的方法,该方法利用内陆冰川表面失相干问题严重的特点,通过比对冰面相干系数和非冰覆盖区域的相干系数,采用阈值法对冰川区域的干涉相干图进行冰川边界的提取.根据上述方法提取冰川边界的精度达到89%,结果表明利用雷达干涉失相干特性进行冰川边界提取是可行的.
Glacier boundary extraction is an important parameter of glacier change monitoring. The optical glacier remote sensing method can effectively and accurately extract the boundary information of glaciers in the cloudless area. However, it is difficult to obtain the glacier in glacier areas with poor cloudiness and weather conditions This paper proposes a method of extracting glacier boundary information based on the characteristics of SAR interfering incoherence. Based on the serious features of inland glacier incoherent incoherence problem and by comparing the coherence coefficient between ice surface and the non-ice coverage area Coefficient, the threshold of the glacier region was used to extract the glacier boundary by using the threshold method.The accuracy of extracting the glacier boundary reached 89% according to the above method, the results show that it is feasible to extract the glacier boundary using the characteristics of the incoherent interference of the radar.