【摘要】 给出了一种干涉合成孔径雷达相位解模糊方法 ,该方法利用边缘检测算子确定干涉图中干涉纹的位置。为了提高干涉纹的检测精度 ,将纹线检测和纹线跟踪相结合 ,并采用了中值滤波和相对平均灰度梯度法 ,该方法具有无积累误差且稳定性好的优点。利用三峡地区的L波段SIR C并行轨道数据 ,运用上述方法得到了解模糊的相位图和局部区域的相对地形图 ,获得了比较满意的结果。更多还原

【Abstract】 A method for phase unwrapping of interferometric SAR was described in this paper. Firstly, we used SAR image edge detection techniques to find the location of the fringe lines in the interferometric phase image. Secondly, we applied the median filter and the method of relative mean gradient of gray scale to improve the accuracy of the fringe detection with a combination of the fringe detection and fringe tracking. We used two thresholds, both high and low, to detect the fringe. By setting the reference phase in the method of phase correcting, we corrected some phase leap points. Finally, a good result of the phase unwrapping is obtained on the basis of the L band data of SIR-C of the Three-Gorge area of China, this shows the advantages of stability and less error of the presented method.更多还原