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// Copyright 2016, Tobias Hermann.
// https://github.com/Dobiasd/frugally-deep
// Distributed under the MIT License.
// (See accompanying LICENSE file or at
// https://opensource.org/licenses/MIT)
#pragma once
#include "fdeep/layers/activation_layer.hpp"
#include <string>
namespace fdeep {
namespace internal {
class celu_layer : public activation_layer {
public:
explicit celu_layer(const std::string& name, float_type alpha)
: activation_layer(name)
, alpha_(alpha)
{
}
protected:
float_type alpha_;
static float_type activation_function(float_type alpha, float_type x)
{
return x >= 0 ? x : alpha * (std::exp(x) - 1);
}
tensor transform_input(const tensor& in_vol) const override
{
return transform_tensor(
fplus::bind_1st_of_2(activation_function, alpha_),
in_vol);
}
};
}
}
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