采用OPENCV实现傅里叶正逆变换，在控制台下显示图像处理结果，处理的图片只针对方图，并且是2的幂次长度的图像,adopt the FFT tranformation and IFFT tranformation in OPENCV

基于VC++实现的一维数组快速傅里叶FFT变换-One-dimensional array FFT VC++ achieve transformation

对调频的时域信号解调，首先差分再希尔伯特变换，对得到的值快速傅里叶变换。(frequency modulated signal demodulation,include difference,Hilbert transform and FFT)

三角波和反三角波序列的时域和FFT幅频特性，余弦信号傅里叶变换，比较DFT和FFT程序的运行时间(The time-domain and FFT amplitude frequency characteristics of the triangular and anti triangular wave sequences, cosine signal Fu Liye transform, and the running time of DFT and FFT programs are compa