【摘要】 预滤波是向量小波变换的关键问题 ,为此就一类具有一定逼近阶的预滤波方法作了详细的讨论 ,并给出了具体的设计方法 .实验表明 ,这种预滤波方法简单、易行 ,而且它的能量聚集比很高更多还原

【Abstract】 The prefiltering was the necessary process in multiwavelets transform. A class of prefilter based on approximation order was described completely, and the construction of this prefilter was given. As an example, the prefilter of CL multiwavelets was presented. The experimental results showed that the method was very simple and the energy ratio was higher than that of Daubechies 4 wavelet.更多还原