摘要
相位解缠是InSAR处理中的一个关键步骤,相位解缠算法的选取很大程度上影响着最终的结果。本文主要介绍和比较了6种常用的相位解缠算法,并选取西藏当雄地区的地震同震影像进行实验分析,对解缠结果的质量进行评价比较。结果表明:统计耗费网络流算法结果充分顾及了相干图所包含的信息,获得了一个较优的全局解,解缠结果的连续性较好。而且直接处理感兴趣的且数据质量好的离散区域,实现效率高,可以将误差限制在一个小范围内,防止误差的再传递,解缠结果较精确。
Phase unwrapping is crucial in InSAR processing,and the suitable phase unwrapping algorithm influences the final result to a large degree.We mainly introduce and compare 6 phase unwrapping algorithms,and obtain unwrapping results by processing co-seismic images in Dangxiong,Tibet.With evaluating and comparing these results,we conclude that Snaphu algorithm makes full allowance of the information in coherence map,obtains better global optima,and has a good continuity.In addition it can directly process the discrete area that is interested and of high-quality.Snaphu algorithm has a high efficiency and can limit the error in a small area,which prevents the error from spreading and gets an accurate result.
出处
《遥感信息》
CSCD
2012年第2期71-76,共6页
Remote Sensing Information
基金
国家自然基金面上项目(40774023)
科技支撑计划(2008BAC35B041-1)
中央级公益性科研院所基本科研业务专项(ZDJ 2007-1)共同资助
