Abstract:Coherent-enhancing anisotropic diffusion filte- ring is an imaging restoring technique in scale space.The paper discussed the general filtering structure of coherent-enhancing anisotropic diffusion,examined the advantages and disadvantages using finite-difference method for solving the explicit evolution equation based on the conception of diffusion tensors presented by Mr.Weichert et al and pointed out the steps of anisotropic diffusion filtering characterized by optimum rotation invariability are follows:①using optimum derivative filtering of template to compute structural tensors;②composing diffusion tensors by structural tensors;③using optimum filtering to compute the right item of evolution equation;④using optimum derivative filtering to compute the left item of evolution equation;⑤implementing following computation by explicit mode.In a process of study,the character of preserving edges is preserved by improvement of algorithm.Using the technique for seismic data processing,on the one hand,it can eliminate noise,increase signal-to-noise ratio and improve data quality;and on the other hand,it can also enhance continuity of reflection events,which is useful for interpretation of low S/N ratio data.Applied real cases showed that the data quality has been greatly improved after filtering processing,highlighting contacting relation between layers and enhancing imaging ability of internal structures of sequence body by seismic data.