void PatchTracking::resamplePatch() {
typedef itk::ResampleImageFilter<RealImage,RealImage> ResampleFilter;
ResampleFilter::Pointer resampler = ResampleFilter::New();
resampler->SetInput(_images[1]);
if (_transform.IsNotNull()) {
resampler->SetTransform(dynamic_cast<ResampleFilter::TransformType*>(_transform.GetPointer()));
}
resampler->SetReferenceImage(_patches[0]);
resampler->UseReferenceImageOn();
// resampler->GraftOutput(_patches[1]);
resampler->Update();
_patches[1] = resampler->GetOutput();
}