Method ExecuteInternal

Code/BasicFilters/src/sitkHashImageFilter.cxx:113–140

template <class TImageType>
std::string
HashImageFilter::ExecuteInternal(const Image & inImage)
{
  using InputImageType = TImageType;

  typename InputImageType::ConstPointer image = dynamic_cast<const InputImageType *>(inImage.GetITKBase());

  using HashFilterType = itk::HashImageFilter<InputImageType>;
  typename HashFilterType::Pointer hasher = HashFilterType::New();
  hasher->SetInput(image);
  hasher->InPlaceOff(); // pointless copy of data needed

  switch (this->GetHashFunction())
  {
    case SHA1:
      hasher->SetHashFunction(HashFilterType::SHA1);
      break;
    case MD5:
      hasher->SetHashFunction(HashFilterType::MD5);
      break;
  }

  this->PreUpdate(hasher.GetPointer());

  hasher->Update();

  return hasher->GetHash();
}

std::string
Hash(const Image & image, HashImageFilter::HashFunction function)