本源码可以完成二维傅里叶变换，把图像从时域变换到频域，很好用,this source code can finish fast fourier transformation, which can transform image from time space to frequency, it is very good

一个FFT的详细算法实现，并生成一个动态链接库，对学习FFT算法和动态链接库编程有帮助。-A FFT algorithm implementation details, and generate a dynamic link library, the study FFT algorithm and dynamic-link library has assist programming.

Simple usage of FFTDLL. You can use it for test you signal using any DAQ board. Cool:)