for(int i = 0; i < (int)(vectimg.size()); i++){
vtkImageData* img = vectimg[i];
vtkImageChangeInformation* change = vtkImageChangeInformation::New();
change->SetInformationInput(img);
change->SetInputConnection(img->GetProducerPort());
for(int i = 0; i < (int)(vectimg.size()); i++){
vtkImageData* img = vectimg[i];
vtkImageChangeInformation* change = vtkImageChangeInformation::New();
change->SetInformationInput(img);
change->SetInputConnection(img->GetProducerPort());