int testRepresenterForVectorImage(const std::string& datadir) {
typedef itk::StandardImageRepresenter<itk::Vector<float, 2>, 2> RepresenterType;
typedef GenericRepresenterTest<RepresenterType> RepresenterTestType;
const std::string referenceFilename = datadir + "/hand_dfs/df-hand-1.vtk";
const std::string testDatasetFilename = datadir + "/hand_dfs/df-hand-2.vtk";
RepresenterType::Pointer representer = RepresenterType::New();
VectorImageType::Pointer reference = loadVectorImage(referenceFilename);
representer->SetReference(reference);
// choose a test dataset, a point and its associate pixel value
VectorImageType::Pointer testDataset = loadVectorImage(testDatasetFilename);
VectorImageType::IndexType idx;
idx.Fill(0);
VectorImageType::PointType testPt;
reference->TransformIndexToPhysicalPoint(idx, testPt);
VectorImageType::PixelType testValue = testDataset->GetPixel(idx);
RepresenterTestType representerTest(representer, testDataset, std::make_pair(testPt, testValue));
return (representerTest.runAllTests() == true);
}
void buildImageIntensityModelOnROI(const char* referenceFilename, const char* maskFilename, const char* dir, const char* outputImageFilename) {
typedef itk::PCAModelBuilder<RepresenterType> ModelBuilderType;
typedef itk::StatisticalModel<RepresenterType> StatisticalModelType;
typedef std::vector<std::string> StringVectorType;
typedef itk::DataManager<RepresenterType> DataManagerType;
RepresenterType::Pointer representer = RepresenterType::New();
typedef itk::ImageFileReader< ImageType > MaskReaderType;
MaskReaderType::Pointer maskReader = MaskReaderType::New();
maskReader->SetFileName( maskFilename );
maskReader->Update();
representer->SetReference( ReadImageFromFile(referenceFilename), maskReader->GetOutput() );
StringVectorType filenames;
getdir(dir, filenames, ".vtk");
DataManagerType::Pointer dataManager = DataManagerType::New();
dataManager->SetRepresenter(representer);
for (StringVectorType::const_iterator it = filenames.begin(); it != filenames.end(); it++) {
std::string fullpath = (std::string(dir) + "/") + *it;
dataManager->AddDataset( ReadImageFromFile(fullpath), fullpath.c_str());
}
ModelBuilderType::Pointer pcaModelBuilder = ModelBuilderType::New();
StatisticalModelType::Pointer model = pcaModelBuilder->BuildNewModel(dataManager->GetSampleDataStructure(), 0);
std::cout<<"dimensionality of the data: "<<model->GetDomain().GetNumberOfPoints()<<", dimension of the images: "<<(*dataManager->GetSampleDataStructure().begin())->GetSample()->GetLargestPossibleRegion().GetNumberOfPixels()<<std::endl;
std::cout<<"writing the mean sample to a png file..."<<std::endl;
typedef itk::ImageFileWriter< ImageType > ImageWriterType;
ImageWriterType::Pointer writer = ImageWriterType::New();
writer->SetFileName( outputImageFilename );
writer->SetInput(model->DrawSample());
writer->Update();
}