Interferogram Filtering Algorithmby Considering Edge Information in DT-CWT Domain

A new algorithm considering edge information in dual tree complex wavelet transform(DT-CWT) domain was proposed in this paper.In the multiscale geometry transforming domain of DT-CWT,the edge coefficients were determined by analyzing both the transitivity of interscale coefficients and the correlation of intrascale coefficients.The edge and non-edge coefficients in DT-CWT domain were shrunk with different thresholds by using the Bayes bivariate shrinkage function.The experimental results show that the algorithm proposed in this paper obviously restrains the interferogram noise and also greatly maintain the edges and details information comparing with the traditional way of soft-threshold denoising in wavelet domain.