基于正弦和余弦函数的小波滤波器的统一解析构造

首次提出用正弦函数和余弦函数解析构造任意长度的紧支集正交小波滤波系数,首先给出了对N＝2k-1时（k个参数）的解析结构,其次给出了N＝2k时正交小波滤波器的统一构造方法,此后验证了著名的Daubechies小波滤波器的构成参数,并验证了一些被广泛的使用的著名小波分析滤波器,所有这些滤波器容易用一组参数直接计算出来,小波滤波器的解析构造使得在应用中动态选择小波基变得极基容易,这一结果必将在小波理论,应用数学及模式识别等领域产生十分重要的作用。     

二维连续信号的近似采样定理

利用加细方程的面具，给出该方程的一个近似解，并根据这个近似解构造出二维连续信号的近似采样定理，其近似采样函数是所求加细方程的近似解，它是由加细方程的面具唯一确定的逐段线性函数，且有显示的计算公式。因此可以根据需要选择加细方程的面具，从而达到控制近似采样函数的衰减速度。     

CONSTRUCTION OF COMPACTLY SUPPORTED BIVARIATE ORTHOGONAL WAVELETS BY UNIVARIATE ORTHOGONAL WAVELETS

After some permutation of conjugate quadrature filter, new conjugate quadrature filters can be derived. In terms of this permutation, an approach is developed for constructing compactly supported bivariate orthogonal wavelets from univariate orthogonal wavelets. Non-separable orthogonal wavelets can be achieved. To demonstrate this method, an example is given.     

Uniform Analytic Construction of Wavelet Analysis Filters Based on Sine and Cosine Trigonometric Functions

1　Ｉｎｔｒｏｄｕｃｔｉｏｎ1 .1ＩｎｔｒｏｄｕｃｔｉｏｎｏｆｂａｃｋｇｒｏｕｎｄＷａｖｅｌｅｔａｎａｌｙｓｉｓａｎｄｉｔｓａｐｐｌｉｃａｔｉｏｎｓｈａｖｅｂｅｃｏｍｅｏｎｅｏｆｔｈｅｆａｓｔｅｓｔｇｒｏｗｉｎｇｒｅｓｅａｒｃｈａｒｅａｓｉｎｒｅｃｅｎｔｙｅａｒｓ[1- 9].Ｅｓｐｅｃｉａｌｌｙ ,ｔｈｅｗａｖｅｌｅｔｔｒａｎｓｆｏｒｍｓｂａｓｅｄｏｎｏｒｔｈｏｎｏｒｍａｌｂａｓｅｓｏｆｃｏｍｐａｃｔｌｙｓｕｐｐｏｒｔｅｄｗａｖｅｌｅｔａｒｅｗｉｄｅｌｙｕｓｅｄｉｎｉｍａｇｅｃｏｍｐｒｅｓｓｉｏｎ ,ｃｏｍ…     

APPROXIMATE SAMPLING THEOREM FOR BIVARIATE CONTINUOUS FUNCTION

An approximate solution of the refinement equation was given by its mask, and the approximate sampling theorem for bivariate continuous function was proved by applying the approximate solution . The approximate sampling function defined uniquely by the mask of the refinement equation is the approximate solution of the equation , a piece-wise linear function , and posseses an explicit computation formula . Therefore the mask of the refinement equation is selected according to one' s requirement, so that one may controll the decay speed of the approximate sampling function .     

α尺度紧支撑正交多小波的构造

1.引 言 自从Geronimo,Hardin和Massopust[1]使用分形插值函数构造出 GHM-多小波以来,对多小波的研究己引起很多人的关注（see[2]～[5]）.出于多通道滤波理论的需要及欲获得比2尺度小波有更大灵活性的小波,a尺度多小波理论被引入.我们知道,2尺度单一小波己相当成熟,特别是在小波的构造方面,己由I.Daubechies[6]得到非常完美的公式: