bilinear_interpolation.hpp

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#ifndef MLPACK_METHODS_ANN_LAYER_BILINEAR_INTERPOLATION_HPP
#define MLPACK_METHODS_ANN_LAYER_BILINEAR_INTERPOLATION_HPP

#include <mlpack/prereqs.hpp>

namespace mlpack {
namespace ann  {

template <
    typename InputDataType = arma::mat,
    typename OutputDataType = arma::mat
>
class BilinearInterpolation
{
 public:
  BilinearInterpolation();

  BilinearInterpolation(const size_t inRowSize,
                        const size_t inColSize,
                        const size_t outRowSize,
                        const size_t outColSize,
                        const size_t depth);

  template<typename eT>
  void Forward(const arma::Mat<eT>&& input, arma::Mat<eT>&& output);

  template<typename eT>
  void Backward(const arma::Mat<eT>&& /*input*/,
                arma::Mat<eT>&& gradient,
                arma::Mat<eT>&& output);

  InputDataType const& InputParameter() const { return inputParameter; }
  InputDataType& InputParameter() { return inputParameter; }

  OutputDataType const& OutputParameter() const { return outputParameter; }
  OutputDataType& OutputParameter() { return outputParameter; }

  OutputDataType const& Delta() const { return delta; }
  OutputDataType& Delta() { return delta; }

  template<typename Archive>
  void serialize(Archive& ar, const unsigned int /* version */);

 private:
  size_t inRowSize;
  size_t inColSize;
  size_t outRowSize;
  size_t outColSize;
  size_t depth;
  OutputDataType delta;
  InputDataType inputParameter;
  OutputDataType outputParameter;
}; // class BilinearInterpolation

} // namespace ann
} // namespace mlpack

// Include implementation.
#include "bilinear_interpolation_impl.hpp"

#endif