public void Process()
{
foreach (PhotoInfo node in photo_info_list)
{
XMPFile xmp_file = new XMPFile();
xmp_file.LoadXML("Sample.xmp");
double focalLen = focallength;
double ppx_mm = ppx / width - 0.5;
double ppy_mm = ppy / height - 0.5;
xmp_file.SetParameters(focallength, ppx_mm, ppy_mm);
xmp_file.SetPosition(node.x, node.y, node.z);
xmp_file.SetRotation(node.mt);
xmp_file.SetDistortion(distorttion_p1, distorttion_p2, distorttion_p3, distorttion_k1, distorttion_k2);
string filename = Path.GetFileNameWithoutExtension(node.image_path);
filename += ".xmp";
filename = Path.Combine(output_folder, filename);
xmp_file.SaveXML(filename);
}
}