基于Forman法对遥感干涉图像进行相位校正的改进  

A Improved Algorithm for Correction of Remote Sensing Interferograms based on Forman Method

作　　者：孙雅敏[1] 殷德奎[1] 

机构地区：[1]中国科学院上海技术物理研究所,上海200083

出　　处：《信号处理》2008年第6期1048-1051,共4页Journal of Signal Processing

摘　　要：相位误差的校正是傅立叶变换光谱仪器计算处理中的重要环节,Forman法是常用的校正方法之一。针对For- man法运算量大、实时性差的缺点,提出了对它的计算过程进行改进的方法。在分析Forman相位校正算法的基本原理和运算流程的基础上,充分运用傅立叶变换和卷积的性质,简化了计算过程,有效的提高了计算效率。重点研究了算法改进的方法和途径,并给出了其流程。最后,估计了改进前后方法的运算量和处理时间的对比。The correction of phase error is an important step in the calculation of Fourier Transform Spectrometer in order to derive spectrum from asymmetry intefferogram. The method given by Forman is one of those normally used correction methods. Based on the theory and procedure of Forman method, an improved algorithm is obtained by applying the quality of Discrete Fourier Transform as well as convolution. With simplified computing process, it provides a possible solution to the disadvantage of huge calculation and poor realtime operation of the original method. The approach of improvement is studied in detail with the flow illustrated. At the end,the comparison of computation time between the two methods is given ,which demonstrates higher efficiency of the improved one.

关 键 词：傅立叶变换光谱仪 干涉图 相位校正 离散傅立叶变换 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] P631.443[自动化与计算机技术—计算机科学与技术]