Copy values from Eigen::Matrix to fdeep::tensor3

eigen_fdeep_copy_values.cpp

// Copy values from Eigen::Matrix to fdeep::tensor5

#include <iostream>
#include <eigen3/Eigen/Dense>
#include <fdeep/fdeep.hpp>

int main()
{
    // dimensions of the eigen matrix
    const int rows = 640;
    const int cols = 480;

    // matrix having its own memory
    Eigen::MatrixXf mat(rows, cols);

    // populate mapped_matrix some way
    mat(0, 0) = 4.0f;
    mat(1, 1) = 5.0f;
    mat(4, 2) = 6.0f;

    // create fdeep::tensor5 with its own memory
    const int tensor5_channels = 1;
    const int tensor5_rows = rows;
    const int tensor5_cols = cols;
    fdeep::shape5 tensor5_shape(1, 1, tensor5_rows, tensor5_cols, tensor5_channels);
    fdeep::tensor5 t(tensor5_shape, 0.0f);

    // copy the values into tensor5

    for (int y = 0; y < tensor5_rows; ++y)
    {
        for (int x = 0; x < tensor5_cols; ++x)
        {
           for (int c = 0; c < tensor5_channels; ++c)
            {
                t.set(0, 0, y, x, c, mat(y, x));
            }
        }
    }

    // print some values to make sure the mapping is correct
    std::cout << t.get(0, 0, 0, 0, 0) << std::endl;
    std::cout << t.get(0, 0, 0, 1, 1) << std::endl;
    std::cout << t.get(0, 0, 0, 4, 2) << std::endl;
}