Function bilinear_policy

tests/validation/reference/Utils.cpp:36–63

// Return the bilinear value at a specified coordinate with different border modes
template <typename T>
T bilinear_policy(
    const SimpleTensor<T> &in, Coordinates id, float xn, float yn, BorderMode border_mode, T constant_border_value)
{
    const int idx = std::floor(xn);
    const int idy = std::floor(yn);

    const float dx   = xn - idx;
    const float dy   = yn - idy;
    const float dx_1 = 1.0f - dx;
    const float dy_1 = 1.0f - dy;

    const T border_value = constant_border_value;

    id.set(0, idx);
    id.set(1, idy);
    const float tl = tensor_elem_at(in, id, border_mode, border_value);
    id.set(0, idx + 1);
    id.set(1, idy);
    const float tr = tensor_elem_at(in, id, border_mode, border_value);
    id.set(0, idx);
    id.set(1, idy + 1);
    const float bl = tensor_elem_at(in, id, border_mode, border_value);
    id.set(0, idx + 1);
    id.set(1, idy + 1);
    const float br = tensor_elem_at(in, id, border_mode, border_value);

    return static_cast<T>(tl * (dx_1 * dy_1) + tr * (dx * dy_1) + bl * (dx_1 * dy) + br * (dx * dy));
}

template int8_t  bilinear_policy(const SimpleTensor<int8_t> &in,
                                 Coordinates                 id,