C++ (Cpp) Pointer::SetPixel Examples

Example #1

File: DemoFindPixelAcrossHole.cpp Project: daviddoria/TempRepo

static void CreateMask(Mask::Pointer mask)
{
  itk::Size<2> size;
  size.Fill(20);

  itk::Index<2> start;
  start.Fill(0);

  itk::ImageRegion<2> region(start,size);

  mask->SetRegions(region);
  mask->Allocate();
  mask->FillBuffer(mask->GetValidValue());

  itk::ImageRegionIterator<Mask> iterator(mask, mask->GetLargestPossibleRegion());

  while(!iterator.IsAtEnd())
    {
    if(iterator.GetIndex()[0] > 5 && iterator.GetIndex()[0] < 15 &&
       iterator.GetIndex()[1] > 5 && iterator.GetIndex()[1] < 15)
      {
      mask->SetPixel(iterator.GetIndex(), mask->GetHoleValue());
      }

    ++iterator;
    }
}

Example #2

File: Mask.cpp Project: daviddoria/TempRepo

void Mask::FindBoundary(UnsignedCharScalarImageType* boundaryImage) const
{
  // Compute the "outer" boundary of the region to fill. That is, we want the boundary pixels to be in the source region.

  //HelpersOutput::WriteImageConditional<Mask>(this->CurrentMask, "Debug/FindBoundary.CurrentMask.mha", this->DebugImages);
  //HelpersOutput::WriteImageConditional<Mask>(this->CurrentMask, "Debug/FindBoundary.CurrentMask.png", this->DebugImages);

  // Create a binary image (throw away the "dont use" pixels)
  Mask::Pointer holeOnly = Mask::New();
  holeOnly->DeepCopyFrom(this);

  itk::ImageRegionIterator<Mask> maskIterator(holeOnly, holeOnly->GetLargestPossibleRegion());
  // This should result in a white hole on a black background
  while(!maskIterator.IsAtEnd())
    {
    itk::Index<2> currentPixel = maskIterator.GetIndex();
    if(!holeOnly->IsHole(currentPixel))
      {
      holeOnly->SetPixel(currentPixel, holeOnly->GetValidValue());
      }
    ++maskIterator;
    }

  //HelpersOutput::WriteImageConditional<Mask>(holeOnly, "Debug/FindBoundary.HoleOnly.mha", this->DebugImages);
  //HelpersOutput::WriteImageConditional<Mask>(holeOnly, "Debug/FindBoundary.HoleOnly.png", this->DebugImages);

  // Since the hole is white, we want the foreground value of the contour filter to be black. This means that the boundary will
  // be detected in the black pixel region, which is on the outside edge of the hole like we want. However,
  // The BinaryContourImageFilter will change all non-boundary pixels to the background color, so the resulting output will be inverted -
  // the boundary pixels will be black and the non-boundary pixels will be white.

  // Find the boundary
  typedef itk::BinaryContourImageFilter <Mask, Mask> binaryContourImageFilterType;
  binaryContourImageFilterType::Pointer binaryContourFilter = binaryContourImageFilterType::New();
  binaryContourFilter->SetInput(holeOnly);
  binaryContourFilter->SetFullyConnected(true);
  binaryContourFilter->SetForegroundValue(holeOnly->GetValidValue());
  binaryContourFilter->SetBackgroundValue(holeOnly->GetHoleValue());
  binaryContourFilter->Update();

  //HelpersOutput::WriteImageConditional<Mask>(binaryContourFilter->GetOutput(), "Debug/FindBoundary.Boundary.mha", this->DebugImages);
  //HelpersOutput::WriteImageConditional<Mask>(binaryContourFilter->GetOutput(), "Debug/FindBoundary.Boundary.png", this->DebugImages);

  // Since we want to interpret non-zero pixels as boundary pixels, we must invert the image.
  typedef itk::InvertIntensityImageFilter <Mask> InvertIntensityImageFilterType;
  InvertIntensityImageFilterType::Pointer invertIntensityFilter = InvertIntensityImageFilterType::New();
  invertIntensityFilter->SetInput(binaryContourFilter->GetOutput());
  invertIntensityFilter->SetMaximum(255);
  invertIntensityFilter->Update();

  //this->BoundaryImage = binaryContourFilter->GetOutput();
  //this->BoundaryImage->Graft(binaryContourFilter->GetOutput());
  ITKHelpers::DeepCopy<UnsignedCharScalarImageType>(invertIntensityFilter->GetOutput(), boundaryImage);

  //HelpersOutput::WriteImageConditional<UnsignedCharScalarImageType>(this->BoundaryImage, "Debug/FindBoundary.BoundaryImage.mha", this->DebugImages);

}