这是一个对位图进行处理的程序，首先读取一幅位图，然后对它进行FFT变换，然后再将变换后的图像显示出来，可以看到变换后的效果-This is a bitmap handle to the procedure, first of all, read a bitmap, and then it FFT transform, and then transformed image is displayed, you can see the effect of transformation