def summarize_activation(op):
"""Summarize an activation.
This applies the given activation and adds useful summaries specific to the
activation.
Args:
op: The tensor to summarize (assumed to be a layer activation).
Returns:
The summary op created to summarize `op`.
"""
if op.op.type in ('Relu', 'Softplus', 'Relu6'):
# Using inputs to avoid floating point equality and/or epsilons.
_add_scalar_summary(
standard_ops.reduce_mean(
standard_ops.to_float(
standard_ops.less(
op.op.inputs[0],
standard_ops.cast(0.0, op.op.inputs[0].dtype)))),
'%s/zeros' % op.op.name)
if op.op.type == 'Relu6':
_add_scalar_summary(
standard_ops.reduce_mean(
standard_ops.to_float(
standard_ops.greater(
op.op.inputs[0],
standard_ops.cast(6.0, op.op.inputs[0].dtype)))),
'%s/sixes' % op.op.name)
return _add_histogram_summary(op, '%s/activation' % op.op.name)
def _apply_activation_with_summaries(x, activation_fn):
"""Returns activation_fn(x).
This applies the given activation and adds useful summaries specific to the
activation.
Args:
x: The tensor to apply activation to.
activation_fn: An activation function.
Returns:
A tensor with activation applied to x.
"""
if activation_fn is None:
return x
y = activation_fn(x)
if activation_fn in (nn.relu, nn.softplus, nn.relu6):
# Using x for comparison to avoid floating point equality and/or epsilons.
_add_scalar_summary(
standard_ops.reduce_mean(
standard_ops.to_float(standard_ops.less(x, 0.0))),
'%s/zeros' % y.op.name)
if activation_fn is nn.relu6:
_add_scalar_summary(
standard_ops.reduce_mean(
standard_ops.to_float(standard_ops.greater(x, 6.0))),
'%s/sixes' % y.op.name)
if activation_fn is nn.l2_normalize:
_add_scalar_summary(
standard_ops.reduce_mean(
standard_ops.sqrt(standard_ops.sum(standard_ops.square(x),
1))),
'%s/length' % y.op.name)
_add_histogram_summary(y, '%s/activations' % y.op.name)
return y
def _apply_activation_with_summaries(x, activation_fn):
"""Returns activation_fn(x).
This applies the given activation and adds useful summaries specific to the
activation.
Args:
x: The tensor to apply activation to.
activation_fn: An activation function.
Returns:
A tensor with activation applied to x.
"""
if activation_fn is None:
return x
y = activation_fn(x)
if activation_fn in (nn.relu, nn.softplus, nn.relu6):
# Using x for comparison to avoid floating point equality and/or epsilons.
_add_scalar_summary(
standard_ops.reduce_mean(standard_ops.to_float(standard_ops.less(
x, 0.0))), '%s/zeros' % y.op.name)
if activation_fn is nn.relu6:
_add_scalar_summary(
standard_ops.reduce_mean(standard_ops.to_float(standard_ops.greater(
x, 6.0))), '%s/sixes' % y.op.name)
if activation_fn is nn.l2_normalize:
_add_scalar_summary(
standard_ops.reduce_mean(standard_ops.sqrt(standard_ops.sum(
standard_ops.square(x), 1))), '%s/length' % y.op.name)
_add_histogram_summary(y, '%s/activations' % y.op.name)
return y
def summarize_activation(op):
"""Summarize an activation.
This applies the given activation and adds useful summaries specific to the
activation.
Args:
op: The tensor to summarize (assumed to be a layer activation).
Returns:
The summary op created to summarize `op`.
"""
if op.op.type in ("Relu", "Softplus", "Relu6"):
# Using inputs to avoid floating point equality and/or epsilons.
_add_scalar_summary(
standard_ops.reduce_mean(
standard_ops.to_float(standard_ops.less(op.op.inputs[0], standard_ops.cast(0.0, op.op.inputs[0].dtype)))
),
"%s/zeros" % op.op.name,
)
if op.op.type == "Relu6":
_add_scalar_summary(
standard_ops.reduce_mean(
standard_ops.to_float(
standard_ops.greater(op.op.inputs[0], standard_ops.cast(6.0, op.op.inputs[0].dtype))
)
),
"%s/sixes" % op.op.name,
)
return _add_histogram_summary(op, "%s/activation" % op.op.name)
