windows下的FFT（快速傅立叶）分析源代码，标准版-windows under the FFT (Fast Fourier) analysis of the source code, the standard version

I ve made an example on how to perform FFT operation using FFTW in OpenCV. It simply loads an image, compute FFT & IFFT, then display the final result. The resulted image has no difference with the original, as it should.