In order to improve PSNR of image restoration,this paper adopts pre-filtering method on the basis of ADMM image restoration algorithm.Three kinds of pre-filtering are applied on three gray-scale images,namely mean filtering,median filtering and wavelet reconstruction,and the calculated points are changed independently in the process.The re-sults show that PSNR of mean filtering,median filtering and wavelet reconstruction reaches 31.95 dB,33.24 dB and 38.58 dB respectively,which are improved compared with the original ADMM algorithm,and the effect of wavelet reconstruc-tion is the most obvious.It shows that pre-filtering method in this paper is suitable for practical engineering application of ADMM.
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