Hi,

I am trying to perform some multi-view triangulation using Eigen C++ library but from C#. I have very basic knowledge on C++ and need if there is a way to do something like this in C# or anyone can guide me how to use Eigen from C#?

This is what I need to do in C#
Eigen::Vector3d TriangulateMultiViewPoint(
const std::vector<Eigen::Matrix3x4d>& proj_matrices,
const std::vector<Eigen::Vector2d>& points)
{
CHECK_EQ(proj_matrices.size(), points.size());

Eigen::Matrix4d A = Eigen::Matrix4d::Zero();

for (size_t i = 0; i < points.size(); i++) {
const Eigen::Vector3d point = points[i].homogeneous().normalized();
const Eigen::Matrix3x4d term =
proj_matrices[i] - point * point.transpose() * proj_matrices[i];
A += term.transpose() * term;
}

Eigen::SelfAdjointEigenSolver<Eigen::Matrix4d> eigen_solver(A);

return eigen_solver.eigenvectors().col(0).hnormalized();
}

I don't know about C# and I don't think you'll get an answer here, but a quick search reveal old attempts like: https://github.com/tbmorgan/EigenNet