FFTW 3.01 目前为止最好的FFT函数库,速度和精度都没得说-far the best FFT functions, speed and accuracy have to say no

里叶变换源程序，采用FFTW3.2.2库编写。-Thismanualdocumentsversion3.2.2ofFFTW,the FastestFourierTransformintheWest. FFTWisacomprehensivecollectionoffastCroutinesforcomputingthediscreteFourier transform(DFT)andvariousspecialcasesthereof.

柏松选择性对比度调整，该算法自动调整对比度，使得图像清晰度增强。需要fftw3.-Selective Contrast adjustment, Given an image, the algorithm modifies the gradient vector field of the image and finally it recovers the new image by solving the poisson equation using the Fast Fourier Transf

FFTW源码及各平台库文件（arm64-v8a平台、armeabi平台、armeabi-v7a平台、mips平台、mips64平台、x86平台、x86_64平台等）(FFTW source code and library files(arm64-v8a, armeabi, armeabi-7a, mips, mips64, x86, x86_64))