(rec, prec, use_07_metric=False)
return ap
ap = voc_ap(rec, prec, [use_07_metric])
  Compute VOC AP given precision and recall.
  If use_07_metric is true, uses the
  VOC 07 11 point method (default:False).
ap = voc_ap(rec, prec, [use_07_metric])
  Compute VOC AP given precision and recall.
  If use_07_metric is true, uses the
  VOC 07 11 point method (default:False).
ap = voc_ap ( rec prec [ use_07_metric ] ) Compute VOC AP given precision and recall . If use_07_metric is true uses the VOC 07 11 point method ( default : False ) .
def voc_ap(rec, prec, use_07_metric=False):
  """ ap = voc_ap(rec, prec, [use_07_metric])
  Compute VOC AP given precision and recall.
  If use_07_metric is true, uses the
  VOC 07 11 point method (default:False).
  """
  if use_07_metric:
    # 11 point metric
    ap = 0.
    for t in np.arange(0., 1.1, 0.1):
      if np.sum(rec >= t) == 0:
        p = 0
      else:
        p = np.max(prec[rec >= t])
      ap = ap + p / 11.
  else:
    # correct AP calculation
    # first append sentinel values at the end
    mrec = np.concatenate(([0.], rec, [1.]))
    mpre = np.concatenate(([0.], prec, [0.]))

    # compute the precision envelope
    for i in range(mpre.size - 1, 0, -1):
      mpre[i - 1] = np.maximum(mpre[i - 1], mpre[i])

    # to calculate area under PR curve, look for points
    # where X axis (recall) changes value
    i = np.where(mrec[1:] != mrec[:-1])[0]

    # and sum (\Delta recall) * prec
    ap = np.sum((mrec[i + 1] - mrec[i]) * mpre[i + 1])
  return ap
def voc_ap ( rec , prec , use_07_metric = False ) : if use_07_metric : # 11 point metric ap = 0. for t in np . arange ( 0. , 1.1 , 0.1 ) : if np . sum ( rec >= t ) == 0 : p = 0 else : p = np . max ( prec [ rec >= t ] ) ap = ap + p / 11. else : # correct AP calculation # first append sentinel values at the end mrec = np . concatenate ( ( [ 0. ] , rec , [ 1. ] ) ) mpre = np . concatenate ( ( [ 0. ] , prec , [ 0. ] ) ) # compute the precision envelope for i in range ( mpre . size - 1 , 0 , - 1 ) : mpre [ i - 1 ] = np . maximum ( mpre [ i - 1 ] , mpre [ i ] ) # to calculate area under PR curve, look for points # where X axis (recall) changes value i = np . where ( mrec [ 1 : ] != mrec [ : - 1 ] ) [ 0 ] # and sum (\Delta recall) * prec ap = np . sum ( ( mrec [ i + 1 ] - mrec [ i ] ) * mpre [ i + 1 ] ) return ap