metric.py 文件源码

def bsnr(vblr, vnsy):
    """
    Compute Blurred Signal to Noise Ratio (BSNR) for a blurred and noisy
    image.

    Parameters
    ----------
    vblr : array_like
      Blurred noise free image
    vnsy : array_like
      Blurred image with additive noise

    Returns
    -------
    x : float
      BSNR of `vnsy` with respect to `vblr` and `vdeg`
    """

    blrvar = np.var(vblr)
    nsevar = np.var(vnsy - vblr)
    with np.errstate(divide='ignore'):
        rt = blrvar/nsevar
    return 10.0*np.log10(rt)