摘要
提出一种结合频率估计的InSAR区域增长相位解缠方法。利用最大似然频率估计方法,估计出局部频率和已展开的相位共同线性,预测出局部区域中心点的展开相位,整体上采用区域生长策略,在质量图的引导下按照从高质量区域到低质量区域的顺序进行积分,可以有效地减小误差传递,较大程度地提高了相位展开结果的精度。数据实验结果验证了这种合成算法的有效性。
This paper presents a region-growing phase unwrapping approach. The unwrapped phase at the central pixel of a local image is obtained by fitting unwrapped phases with an ideal plane assumed, with local frequencies estimated by the maximum likelihood （ML） estimator. A region-growing strategy is taken, in which a quality map guides the phase unwrapping from high-quality pixels to low-quality pixels, minimizing the propagation of errors. Experiment results prove the validity of this approach.
出处
《电子科技》
2010年第4期69-72,共4页
Electronic Science and Technology
关键词
相位展开
局部频率估计
区域增长法
INSAR
phase unwrapping, local frequencies estimate, region-growing, interferometric synthetic apertureradar （InSAR）
