基于小波变换的单帧干涉图象分析

本文提出了利用复数小波变换对干涉图象相位进行分块线性拟合的一种新颖的单帧干涉图象分析方法。首先对干涉图象进行适当的分块,然后通过线性相位模型对每个子块的相位进行拟合;拟合系数通过干涉图象分块的小波变换与最小均方误差估计方法获得。该方法克服了傅立叶分析方法的相位去包裹过程以及迭代算法计算量大的缺点。仿真实验表明该方法具有较高的精度和可行性。

Single-frame fringe analysis based on wavelet transform

In this paper,A single-frame fringe analysis method is presented,in which subdivided fringe is modeled by linear phase and the coefficients are extracted by complex wavelet transform(CWT).Firstly the fringe is subdivided properly,then we get the estimated phase in subdivided regions based on the wavelet method and minimum mean errors estimates method.The suggested method avoids the phase unwrapped process based on FFT and overcomes the difficulties using iterative methods.Simulation shows this method is accurate and feasible.