Exemple #1
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def disc_mutual_info_loss(c_disc, aux_dist):
    """
    Mutual Information lower bound loss for discrete distribution.
    """
    reg_disc_dim = aux_dist.get_shape().as_list()[-1]
    cross_ent = -K.mean(K.sum(K.log(aux_dist + EPSILON) * c_disc, axis=1))
    ent = -K.mean(K.sum(K.log(1. / reg_disc_dim + EPSILON) * c_disc, axis=1))

    return -(ent - cross_ent)
Exemple #2
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def mean_absolute_percentage_error(y_true, y_pred):
  # Equivalent to MAE, but sometimes easier to interpret.
  diff = K.abs((y_true - y_pred) / K.clip(K.abs(y_true), K.epsilon(), None))
  return 100. * K.mean(diff, axis=-1)
Exemple #3
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def mean_squared_error(y_true, y_pred):
  return K.mean(K.square(y_pred - y_true), axis=-1)
Exemple #4
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def top_k_categorical_accuracy(y_true, y_pred, k=5):
    return K.mean(K.in_top_k(y_pred, K.argmax(y_true, axis=-1), k), axis=-1)
Exemple #5
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def mean_pred(y_true, y_pred):  # score_array = fn(y_true, y_pred) must 2 args
    return K.mean(y_pred)
Exemple #6
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 def call(self, inputs):
   return K.mean(inputs, axis=1)
Exemple #7
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 def call(self, inputs):
   if self.data_format == 'channels_last':
     return K.mean(inputs, axis=[1, 2, 3])
   else:
     return K.mean(inputs, axis=[2, 3, 4])
Exemple #8
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def poisson(y_true, y_pred):
  return K.mean(y_pred - y_true * K.log(y_pred + K.epsilon()), axis=-1)
Exemple #9
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def logcosh(y_true, y_pred):

  def cosh(x):
    return (K.exp(x) + K.exp(-x)) / 2

  return K.mean(K.log(cosh(y_pred - y_true)), axis=-1)
Exemple #10
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def hinge(y_true, y_pred):
  return K.mean(K.maximum(1. - y_true * y_pred, 0.), axis=-1)
Exemple #11
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def squared_hinge(y_true, y_pred):
  return K.mean(K.square(K.maximum(1. - y_true * y_pred, 0.)), axis=-1)
Exemple #12
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def mean_squared_logarithmic_error(y_true, y_pred):
  first_log = K.log(K.clip(y_pred, K.epsilon(), None) + 1.)
  second_log = K.log(K.clip(y_true, K.epsilon(), None) + 1.)
  return K.mean(K.square(first_log - second_log), axis=-1)
Exemple #13
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def mean_absolute_percentage_error(y_true, y_pred):
  # Equivalent to MAE, but sometimes easier to interpret.
  diff = K.abs((y_true - y_pred) / K.clip(K.abs(y_true), K.epsilon(), None))
  return 100. * K.mean(diff, axis=-1)
Exemple #14
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def mean_absolute_error(y_true, y_pred):
  return K.mean(K.abs(y_pred - y_true), axis=-1)
Exemple #15
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def squared_hinge(y_true, y_pred):
  return K.mean(K.square(K.maximum(1. - y_true * y_pred, 0.)), axis=-1)
Exemple #16
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def hinge(y_true, y_pred):
  return K.mean(K.maximum(1. - y_true * y_pred, 0.), axis=-1)
Exemple #17
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def binary_crossentropy(y_true, y_pred):
  return K.mean(K.binary_crossentropy(y_pred, y_true), axis=-1)
Exemple #18
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def mean_squared_error(y_true, y_pred):
  return K.mean(K.square(y_pred - y_true), axis=-1)
Exemple #19
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def poisson(y_true, y_pred):
  return K.mean(y_pred - y_true * K.log(y_pred + K.epsilon()), axis=-1)
Exemple #20
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def cosine_proximity(y_true, y_pred):
  y_true = K.l2_normalize(y_true, axis=-1)
  y_pred = K.l2_normalize(y_pred, axis=-1)
  return -K.mean(y_true * y_pred, axis=-1)
Exemple #21
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def risk_estimation(y_true, y_pred):
    return -100. * K.mean((y_true - 0.0002) * y_pred)
Exemple #22
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 def call(self, inputs):
   if self.data_format == 'channels_last':
     return K.mean(inputs, axis=[1, 2, 3])
   else:
     return K.mean(inputs, axis=[2, 3, 4])
Exemple #23
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def logcosh(y_true, y_pred):
    def cosh(x):
        return (K.exp(x) + K.exp(-x)) / 2

    return K.mean(K.log(cosh(y_pred - y_true)), axis=-1)
Exemple #24
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def binary_accuracy(y_true, y_pred):
    return K.mean(K.equal(y_true, K.round(y_pred)), axis=-1)
Exemple #25
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 def _huber_loss(self, target, prediction):
     # sqrt(1+error^2)-1
     error = prediction - target
     return K.mean(K.sqrt(1 + K.square(error)) - 1, axis=-1)
Exemple #26
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def sparse_top_k_categorical_accuracy(y_true, y_pred, k=5):
    return K.mean(K.in_top_k(y_pred, K.cast(K.max(y_true, axis=-1), 'int32'),
                             k),
                  axis=-1)
Exemple #27
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def sample_mean_absolute_percentage_error(y_true, y_pred):
    diff = K.abs((y_true - y_pred) /
                 K.clip(K.abs(y_true) + K.abs(y_pred), K.epsilon(), None))
    return 200. * K.mean(diff, axis=-1)
Exemple #28
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def mean_absolute_error(y_true, y_pred):
  return K.mean(K.abs(y_pred - y_true), axis=-1)
Exemple #29
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def normalize(x):
    """
    Used in heatmap function - normalises a tensor by its L2 norm.
    """
    return x / (K.sqrt(K.mean(K.square(x))) + 1e-5)
Exemple #30
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def mean_squared_logarithmic_error(y_true, y_pred):
  first_log = K.log(K.clip(y_pred, K.epsilon(), None) + 1.)
  second_log = K.log(K.clip(y_true, K.epsilon(), None) + 1.)
  return K.mean(K.square(first_log - second_log), axis=-1)
Exemple #31
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def binary_accuracy(y_true, y_pred):
  return K.mean(K.equal(y_true, K.round(y_pred)), axis=-1)
Exemple #32
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def balanced_squared_hinge(y_true, y_pred):
  postive = K.cumsum(y_true-0.)
  negtive = K.cumsum(1.-y_true)
  posrate = postive/(postive+negtive)
  negrate = negtive/(postive+negtive)
  return K.mean(K.square(K.maximum((1. - y_pred) * y_true, 0.)), axis=-1)*negrate + K.mean(K.square(K.maximum((1. - y_true) * y_pred, 0.)), axis=-1)*posrate
Exemple #33
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def top_k_categorical_accuracy(y_true, y_pred, k=5):
  return K.mean(K.in_top_k(y_pred, K.argmax(y_true, axis=-1), k), axis=-1)
Exemple #34
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def binary_crossentropy(y_true, y_pred):
  return K.mean(K.binary_crossentropy(y_pred, y_true), axis=-1)
Exemple #35
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 def call(self, inputs):
   return K.mean(inputs, axis=1)
Exemple #36
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def cosine_proximity(y_true, y_pred):
  y_true = K.l2_normalize(y_true, axis=-1)
  y_pred = K.l2_normalize(y_pred, axis=-1)
  return -K.mean(y_true * y_pred, axis=-1)
Exemple #37
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def sparse_top_k_categorical_accuracy(y_true, y_pred, k=5):
  return K.mean(K.in_top_k(y_pred,
                           K.cast(K.max(y_true, axis=-1), 'int32'), k), axis=-1)