+ int maskDimension, maskComponents;
+ std::string maskPixelType;
+ ReadImageDimensionAndPixelType(m_ArgsInfo.mask_arg, maskDimension, maskPixelType, maskComponents);
+
+ if (maskDimension == Dimension - 1) {
+ // Due to a limitation of filter itk::LabelStatisticsImageFilter, InputImageType and LabelImageType
+ // must have the same image dimension. However, we want to support label images with Dl = Di - 1,
+ // so we need to replicate the label image as many times as the size along dimension Di.
+ if (m_Verbose)
+ std::cout << "Replicating label image to match input image's dimension... " << std::endl;
+
+ typedef itk::Image<LabelPixelType, Dimension - 1> ReducedLabelImageType;
+ typedef itk::ImageFileReader<ReducedLabelImageType> LabelImageReaderType;
+ typedef itk::JoinSeriesImageFilter<ReducedLabelImageType, LabelImageType> JoinImageFilterType;
+
+ typename LabelImageReaderType::Pointer labelImageReader=LabelImageReaderType::New();
+ labelImageReader->SetFileName(m_ArgsInfo.mask_arg);
+ labelImageReader->Update();
+
+ typename JoinImageFilterType::Pointer joinFilter = JoinImageFilterType::New();
+ typename InputImageType::SizeType size = input->GetLargestPossibleRegion().GetSize();
+ for (unsigned int i = 0; i < size[Dimension - 1]; i++)
+ joinFilter->PushBackInput(labelImageReader->GetOutput());
+
+ joinFilter->Update();
+ labelImage = joinFilter->GetOutput();
+ }
+ else {
+ typedef itk::ImageFileReader<LabelImageType> LabelImageReaderType;
+ typename LabelImageReaderType::Pointer labelImageReader=LabelImageReaderType::New();
+ labelImageReader->SetFileName(m_ArgsInfo.mask_arg);
+ labelImageReader->Update();
+ labelImage= labelImageReader->GetOutput();
+
+ // Check mask sampling/size
+ if (!HaveSameSizeAndSpacing<LabelImageType, InputImageType>(labelImage, input)) {
+ if (m_ArgsInfo.allow_resize_flag) {
+ if (m_ArgsInfo.verbose_flag) {
+ std::cout << "Resize mask image like input" << std::endl;
+ }
+ typedef clitk::ResampleImageWithOptionsFilter<LabelImageType> ResamplerType;
+ typename ResamplerType::Pointer resampler = ResamplerType::New();
+ resampler->SetInput(labelImage);
+ resampler->SetOutputSpacing(input->GetSpacing());
+ resampler->Update();
+ labelImage = resampler->GetOutput();
+
+ typename itk::ImageBase<LabelImageType::ImageDimension>::RegionType reg
+ = input->GetLargestPossibleRegion();
+ labelImage = ResizeImageLike<LabelImageType>(labelImage, ®, 0);
+ }
+ else {
+ std::cerr << "Mask image has a different size/spacing than input. Abort" << std::endl;
+ exit(-1);
+ }
+ }
+
+ }
+