metrics.py 文件源码

def compute_EER(Pfa, Pmiss):
  """ computes the equal error rate (EER) given
  Pmiss or False Negative Rate
  and
  Pfa or False Positive Rate
  calculated for a range of operating points on the DET curve

  @Author: "Timothee Kheyrkhah, Omid Sadjadi"
  """
  fpr = Pfa
  fnr = Pmiss
  diff_pm_fa = fnr - fpr
  x1 = np.flatnonzero(diff_pm_fa >= 0)[0]
  x2 = np.flatnonzero(diff_pm_fa < 0)[-1]
  a = (fnr[x1] - fpr[x1]) / (fpr[x2] - fpr[x1] - (fnr[x2] - fnr[x1]))
  return fnr[x1] + a * (fnr[x2] - fnr[x1])