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this paper main around the polyphase structure of filter bank to design. First introduce the theory and the basic structure of multi-sampling. Utilize these can improve the original structure of the filter bank, obtained the corresponding polyphase filter structure. This structure has greatly improved the speed of the filtering computing. Then use FIR filters to realize filtering part, and introduced...
In this paper, a new method of image blind denoising is proposed based on symmetric-antisymmetric orthonormal multiwavelet and multilevel threshold. In this method, noise deviation of noised image is estimated firstly; then noised image is decomposed by Sa4 multiwavelet; thirdly according to coefficients energy distribution and estimated noise deviation, the coefficients of different scale are dealed...
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