fortran编写的解二维椭圆方程程序，周期性边界条件，快速傅立叶变换和解三对角矩阵。-Solutions of two-dimensional elliptic equation written in Fortran program, periodic boundary conditions, a fast Fourier Transform and tridiagonal matrices.

fortran 77，解二维压力Poisson方程，余弦快速傅立叶变换，三对角矩阵，第一类边界条件。-fortran 77, the pressure-dimensional Poisson equation solution, cosine fast Fourier transform, tridiagonal matrix, the first boundary condition.

根据现有的程序，对两幅图像分别进行二维小波变换，分别对变换后得到的水平，垂直以及对角细节子带的小波系数进行直方图统计，然后用广义高斯函数去近似三个直方图，分别得到尺度参数和形状参数，求出对应图像的KL距离。(According to the existing programs, the two images respectively, two-dimensional wavelet transform respectively to levels after transformation, ve