Source code for nnabla_nas.module.relu

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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
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#     http://www.apache.org/licenses/LICENSE-2.0
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import nnabla.functions as F

from .module import Module




class ReLU(Module):
    r"""ReLU layer.
    Applies the rectified linear unit function element-wise.

    Args:
        inplace (bool, optional): can optionally do the operation in-place.
            Default: ``False``.
        name (string): the name of this module
    """

    def __init__(self, inplace=False, name=''):
        self._scope_name = f'<relu at {hex(id(self))}>'
        Module.__init__(self, name=name)
        self._inplace = inplace



    def call(self, input):
        return F.relu(input, inplace=self._inplace)




    def extra_repr(self):
        return f'inplace={self._inplace}'






class ReLU6(Module):
    r"""ReLU6 layer.
    Capping ReLU activation to 6 is often observed to learn sparse features
    earlier.
    Args:
        name (string): the name of this module

    """

    def __init__(self, name=''):
        self._scope_name = f'<relu6 at {hex(id(self))}>'
        Module.__init__(self, name=name)



    def call(self, input):
        return F.relu6(input)






class LeakyReLU(Module):
    r"""LeakyReLU layer.
    Element-wise Leaky Rectified Linear Unit (ReLU) function.

    Args:
        alpha(float, optional): The slope value multiplied to negative numbers.
            :math:`\alpha` in the definition. Defaults to 0.1.
        inplace (bool, optional): can optionally do the operation in-place.
            Default: ``False``.
        name (string): the name of this module
    """

    def __init__(self, alpha=0.1, inplace=False, name=''):
        self._scope_name = f'<leakyrelu at {hex(id(self))}>'
        Module.__init__(self, name=name)
        self._alpha = alpha
        self._inplace = inplace



    def call(self, input):
        return F.leaky_relu(input, alpha=self._alpha, inplace=self._inplace)




    def extra_repr(self):
        return f'alpha={self._alpha}, inplace={self._inplace}'