FaceRecognizer.py 文件源码

def fft_convolve2d(self, x,y):
        """ 2D convolution, using FFT"""
        fr = fft2(x)
        fr2 = fft2(np.flipud(np.fliplr(y)))
        m,n = fr.shape
        cc = np.real(ifft2(fr*fr2))
        cc = np.roll(cc, -m/2+1,axis=0)
        cc = np.roll(cc, -n/2+1,axis=1)
        return cc