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介绍了母小波和完全小波系的概念，详述了它们的数字特征。给出了连续小波变换、离散小波变换和二进离散小波变换的定义并参考Ｒ２空问的矢量表达式导出了它们的逆变换。
The concepts of mother wavelet and complete wavelet are introduced, and their digital features are described in detail. The definitions of continuous wavelet transform, discrete wavelet transform and binary discrete wavelet transform are given and their inverse transformations are derived with reference to the vector representation of R2 space.