bool CreateRandomDistanceImage(unsigned int dimX, unsigned int dimY, ItkImageType_2D::Pointer& itkImage, mitk::Image::Pointer& mitkImage) //TODO warum ITK image?
{
//initialize ITK output image
ItkImageType_2D::IndexType start;
start[0] = 0;
start[1] = 0;
ItkImageType_2D::SizeType size;
size[0] = dimX;
size[1] = dimY;
ItkImageType_2D::RegionType region;
region.SetSize(size);
region.SetIndex( start);
ItkImageType_2D::SpacingType spacing;
spacing[0] = 1.0;
spacing[1] = 1.0;
itkImage->SetRegions( region );
itkImage->SetSpacing ( spacing );
itkImage->Allocate();
ItkImageRegionIteratorType2D imageIterator(itkImage,itkImage->GetLargestPossibleRegion());
imageIterator.GoToBegin();
itk::Statistics::MersenneTwisterRandomVariateGenerator::Pointer randomGenerator = itk::Statistics::MersenneTwisterRandomVariateGenerator::New();
while (!imageIterator.IsAtEnd())
{
ToFScalarType pixelValue = randomGenerator->GetUniformVariate(0.0,1000.0);
imageIterator.Set(pixelValue);
++imageIterator;
}
mitk::CastToMitkImage(itkImage,mitkImage);
return true;
}
int mitkToFCompositeFilterTest(int /* argc */, char* /*argv*/[])
{
MITK_TEST_BEGIN("ToFCompositeFilter");
//initialize composite filter
mitk::ToFCompositeFilter::Pointer compositeFilter = mitk::ToFCompositeFilter::New();
//Initialize threshold filter
ThresholdFilterType::Pointer thresholdFilter = ThresholdFilterType::New();
int threshold_min = 5;
int threshold_max = 100;
thresholdFilter->SetOutsideValue(0.0);
thresholdFilter->SetLower(threshold_min);
thresholdFilter->SetUpper(threshold_max);
compositeFilter->SetThresholdFilterParameter(threshold_min, threshold_max);
//Initialize spatial median filter
MedianFilterType::Pointer medianFilter = MedianFilterType::New();
//Initialize bilateral filter
BilateralImageFilterType::Pointer bilateralFilter = BilateralImageFilterType::New();
float domainSigma = 4;
float rangeSigma = 50;
float kernelRadius = 3;
bilateralFilter->SetDomainSigma(domainSigma);
bilateralFilter->SetRangeSigma(rangeSigma);
bilateralFilter->SetRadius(kernelRadius);
compositeFilter->SetBilateralFilterParameter(domainSigma,rangeSigma,kernelRadius);
//Initialize pipeline
ItkImageType_2D::Pointer itkInputImage = ItkImageType_2D::New();
mitk::Image::Pointer mitkInputImage = mitk::Image::New();
CreateRandomDistanceImage(100,100,itkInputImage,mitkInputImage);
ItkImageType_2D::Pointer itkOutputImage;
compositeFilter->SetInput(mitkInputImage);
mitk::Image::Pointer mitkOutputImage = compositeFilter->GetOutput();
//-------------------------------------------------------------------------------------------------------
//Apply first filter only (threshold)
//standard variant
thresholdFilter->SetInput(itkInputImage);
itkOutputImage = thresholdFilter->GetOutput();
itkOutputImage->Update();
//variant with composite filter
compositeFilter->SetApplyThresholdFilter(true);
compositeFilter->SetApplyMedianFilter(false);
compositeFilter->SetApplyTemporalMedianFilter(false);
compositeFilter->SetApplyBilateralFilter(false);
mitkOutputImage->Update();
//compare output
mitk::Image::Pointer itkOutputImageConverted;
mitk::CastToMitkImage(itkOutputImage,itkOutputImageConverted);
MITK_TEST_CONDITION_REQUIRED( mitk::Equal(*itkOutputImageConverted, *mitkOutputImage, mitk::eps, true),
"Test threshold filter in pipeline");
//-------------------------------------------------------------------------------------------------------
//Apply first and second filter
//standard variant
medianFilter->SetInput(thresholdFilter->GetOutput());
itkOutputImage = medianFilter->GetOutput();
itkOutputImage->Update();
//variant with composite filter
compositeFilter->SetApplyMedianFilter(true);
mitkOutputImage->Update();
//compare output
mitk::CastToMitkImage(itkOutputImage,itkOutputImageConverted);
MITK_TEST_CONDITION_REQUIRED( mitk::Equal(*itkOutputImageConverted, *mitkOutputImage, mitk::eps, true),
"Test threshold and median filter in pipeline");
//-------------------------------------------------------------------------------------------------------
//Apply first three filters
//standard variant
bilateralFilter->SetInput(medianFilter->GetOutput());
itkOutputImage = bilateralFilter->GetOutput();
itkOutputImage->Update();
//variant with composite filter
compositeFilter->SetApplyBilateralFilter(true);
mitkOutputImage->Update();
//compare output
mitk::CastToMitkImage(itkOutputImage,itkOutputImageConverted);
MITK_TEST_CONDITION_REQUIRED( mitk::Equal(*itkOutputImageConverted, *mitkOutputImage, mitk::eps, true),
"Test threshold filter, bilateral filter and temporal median filter in pipeline");
//-------------------------------------------------------------------------------------------------------
// TODO: Rewrite this. This don't make sense. the itk reference applies a median filter
// and threshold filter afterwards. The composite filter does it in the other directtion.
// also the input of random image stacks is never set into the composite filter
//Apply all filters
//generate image stack
// ItkImageType_3D::Pointer itkInputImage3D = ItkImageType_3D::New();
// mitk::Image::Pointer mitkImage3D = mitk::Image::New();
// CreateRandomDistanceImageStack(100,100,12,itkInputImage3D,mitkImage3D);
//
// //standard variant
// ItkImageType_2D::Pointer medianFilteredImage = ItkImageType_2D::New();
// ApplyTemporalMedianFilter(mitkImage3D,medianFilteredImage);
// thresholdFilter->SetInput(medianFilteredImage);
// itkOutputImage->Update();
//
// //variant with composite filter
// compositeFilter->SetApplyTemporalMedianFilter(true);
// mitkOutputImage->Update();
//
// //compare output
// mitk::CastToMitkImage(itkOutputImage,itkOutputImageConverted);
// pipelineSuccess = CompareImages(itkOutputImageConverted,mitkOutputImage);
// MITK_TEST_CONDITION_REQUIRED(pipelineSuccess,"Test all filters in pipeline");
//-------------------------------------------------------------------------------------------------------
//Check set/get functions
mitk::Image::Pointer newImage = mitk::Image::New();
mitk::Image::Pointer returnedImage;
compositeFilter->SetInput(newImage);
returnedImage = compositeFilter->GetInput();
MITK_TEST_CONDITION_REQUIRED(newImage == returnedImage,"Get/Set empty image");
compositeFilter->SetApplyTemporalMedianFilter(false);
MITK_TEST_CONDITION_REQUIRED(compositeFilter->GetApplyTemporalMedianFilter()==false,"Get/Set ApplyTemporalMedianFilter");
compositeFilter->SetApplyMedianFilter(false);
MITK_TEST_CONDITION_REQUIRED(compositeFilter->GetApplyMedianFilter()==false,"Get/Set ApplyMedianFilter");
compositeFilter->SetApplyThresholdFilter(false);
MITK_TEST_CONDITION_REQUIRED(compositeFilter->GetApplyThresholdFilter()==false,"Get/Set ApplyThresholdFilter");
compositeFilter->SetApplyBilateralFilter(false);
MITK_TEST_CONDITION_REQUIRED(compositeFilter->GetApplyBilateralFilter()==false,"Get/Set ApplyBilateralFilter");
//-------------------------------------------------------------------------------------------------------
MITK_TEST_END();
}
static bool ApplyTemporalMedianFilter(mitk::Image::Pointer& image, ItkImageType_2D::Pointer& itkImage2D)
{
//initialize ITK output image
unsigned int dimX = image->GetDimension(0);
unsigned int dimY = image->GetDimension(1);
unsigned int nbSlices = image->GetDimension(2);
ItkImageType_2D::SizeType size;
size[0] = dimX;
size[1] = dimY;
ItkImageType_2D::RegionType region;
region.SetSize(size);
ItkImageType_2D::SpacingType spacing;
spacing[0] = 1.0;
spacing[1] = 1.0;
itkImage2D->SetRegions( region );
itkImage2D->SetSpacing ( spacing );
itkImage2D->Allocate();
//initialize median filtering
std::vector<ToFScalarType> allDistances;
mitk::Index3D curIdx3D;
ItkImageType_2D::IndexType curIdx2D;
//compute median over time for each (x,y)
for(unsigned int i = 0; i<dimX; i++)
{
for(unsigned int j = 0; j < dimY; j++)
{
allDistances.clear();
curIdx3D[0] = i; curIdx3D[1] = j;
curIdx2D[0] = i; curIdx2D[1] = j;
//gather all distances for one pixel
for(unsigned int k = 0; k < nbSlices; k++)
{
curIdx3D[2] = k;
allDistances.push_back(image->GetPixelValueByIndex(curIdx3D));
}
//sort distances and compute median
std::sort(allDistances.begin(),allDistances.end());
unsigned int median_idx = nbSlices/2;
if(nbSlices%2 == 1) //i.e., there is an odd number of slices
{
itkImage2D->SetPixel(curIdx2D,allDistances[median_idx]);
} else
{
ToFScalarType upper = allDistances[median_idx];
ToFScalarType lower = allDistances[median_idx+1];
itkImage2D->SetPixel(curIdx2D,(upper+lower)/2.0);
}
}
}
return true;
}
