Daubechies小波基的构造 求解小波尺度函数离散整数点的值-Construction of Daubechies wavelet basis functions for solving the discrete wavelet scale the value of integer points

将图像进行二维傅立叶变换，选取一定数量大系数，其余置零，然后还原图像。(The image is a two-dimensional Fu Liye transformation, select a certain number of coefficients, the rest to zero, and then restore the image.)