private void BackgroundWorkerSequential_DoWork(object sender, DoWorkEventArgs e)
        {
            BackgroundWorker       worker     = sender as BackgroundWorker;
            RegistrationController controller = new RegistrationController(RegistrationParametersMultiple, worker);

            controller.RunRegistration(ImageStackToRegister);
        }
        private void backgroundWorkerNonRigid_DoWork(object sender, DoWorkEventArgs e)
        {
            BackgroundWorker       worker     = sender as BackgroundWorker;
            RegistrationController controller = new RegistrationController(RegistrationParametersNonRigid, worker);

            controller.RunRegistration(ImageStackToRegister);
        }