ITK/Examples/Broken/SimpleOperations/MetaDataDictionary

Current output is:

ASimpleFloat  [UNKNOWN_PRINT_CHARACTERISTICS]
Key   = ASimpleFloat
Value = [UNKNOWN_PRINT_CHARACTERISTICS]

Data read from file:

There are two problems.

1) UNKNOWN_PRINT_CHARACTERISTICS should be replaced with 1.2. 

2) The data does not seem to be retrieved from the file.

MetaDataDictionary.cxx

<source lang="cpp">

1. include <itkImage.h>
2. include <itkMetaDataDictionary.h>
3. include <itkMetaDataObject.h>
4. include <itkImageRegionIterator.h>
5. include <itkImageFileWriter.h>
6. include <itkImageFileReader.h>

typedef itk::Image<unsigned char, 2> ImageType;

static void CreateImage(ImageType::Pointer image);

int main(int, char*[]) {

 // Create an image
 ImageType::Pointer image = ImageType::New();
 CreateImage(image);

 // Store some data in it
 itk::MetaDataDictionary dictionary;
 itk::EncapsulateMetaData<float>(dictionary,"ASimpleFloat",1.2);
 image->SetMetaDataDictionary(dictionary);

 // View all of the data
 dictionary.Print(std::cout);

 // View the data individually
 itk::MetaDataDictionary::Iterator itr = dictionary.Begin();
 
 while( itr != dictionary.End() )
   {
   std::cout << "Key   = " << itr->first << std::endl;
   std::cout << "Value = ";
   itr->second->Print( std::cout );
   std::cout << std::endl;
   ++itr;
   }

 // Write the image (and the data) to a file
 typedef  itk::ImageFileWriter< ImageType  > WriterType;
 WriterType::Pointer writer = WriterType::New();
 writer->SetFileName("test.mhd");
 writer->SetInput(image);
 writer->Update();

 // Read the image (and data) from the file
 typedef itk::ImageFileReader<ImageType> ReaderType;
 ReaderType::Pointer reader = ReaderType::New();
 reader->SetFileName("test.mhd");

 // Display the data
 std::cout << "Data read from file:" << std::endl;
 reader->GetMetaDataDictionary().Print(std::cout);

 return EXIT_SUCCESS;

}

void CreateImage(ImageType::Pointer image) {

 ImageType::IndexType start;
 start.Fill(0);

 ImageType::SizeType size;
 size.Fill(10);

 ImageType::RegionType region;
 region.SetSize(size);
 region.SetIndex(start);

 image->SetRegions(region);
 image->Allocate();

 itk::ImageRegionIterator<ImageType> imageIterator(image,image->GetLargestPossibleRegion());

 while(!imageIterator.IsAtEnd())
   {
   imageIterator.Set(20);
   ++imageIterator;
   }

} </source>

CMakeLists.txt

<source lang="cmake"> cmake_minimum_required(VERSION 2.6)

PROJECT(MetaDataDictionary)

FIND_PACKAGE(ITK REQUIRED) INCLUDE(${ITK_USE_FILE})

ADD_EXECUTABLE(MetaDataDictionary MetaDataDictionary.cxx) TARGET_LINK_LIBRARIES(MetaDataDictionary ITKCommon ITKIO)

</source>