Calculates the local variation in each pixel. More...
#include <itkLocalVariationImageFilter.h>
Public Types | |
| typedef TInputImage | InputImageType |
| typedef TOutputImage | OutputImageType |
| typedef LocalVariationImageFilter | Self |
| typedef ImageToImageFilter < InputImageType, OutputImageType > | Superclass |
| typedef SmartPointer< Self > | Pointer |
| typedef SmartPointer< const Self > | ConstPointer |
| typedef InputImageType::PixelType | InputPixelType |
| typedef OutputImageType::PixelType | OutputPixelType |
| typedef InputImageType::RegionType | InputImageRegionType |
| typedef OutputImageType::RegionType | OutputImageRegionType |
| typedef InputImageType::SizeType | InputSizeType |
Public Member Functions | |
| itkStaticConstMacro (InputImageDimension, unsigned int, TInputImage::ImageDimension) | |
| itkStaticConstMacro (OutputImageDimension, unsigned int, TOutputImage::ImageDimension) | |
| virtual const char * | GetClassName () const |
| virtual void | GenerateInputRequestedRegion () throw (InvalidRequestedRegionError) |
Static Public Member Functions | |
| static Pointer | New () |
Protected Member Functions | |
| LocalVariationImageFilter () | |
| virtual | ~LocalVariationImageFilter () |
| void | PrintSelf (std::ostream &os, Indent indent) const |
| void | ThreadedGenerateData (const OutputImageRegionType &outputRegionForThread, int threadId) |
Calculates the local variation in each pixel.
Reference: Tony F. Chan et al., The digital TV filter and nonlinear denoising
Definition at line 47 of file itkLocalVariationImageFilter.h.
| typedef SmartPointer<const Self> itk::LocalVariationImageFilter< TInputImage, TOutputImage >::ConstPointer |
Definition at line 65 of file itkLocalVariationImageFilter.h.
| typedef InputImageType::RegionType itk::LocalVariationImageFilter< TInputImage, TOutputImage >::InputImageRegionType |
Definition at line 77 of file itkLocalVariationImageFilter.h.
| typedef TInputImage itk::LocalVariationImageFilter< TInputImage, TOutputImage >::InputImageType |
Convenient typedefs for simplifying declarations.
Definition at line 58 of file itkLocalVariationImageFilter.h.
| typedef InputImageType::PixelType itk::LocalVariationImageFilter< TInputImage, TOutputImage >::InputPixelType |
Image typedef support.
Definition at line 71 of file itkLocalVariationImageFilter.h.
| typedef InputImageType::SizeType itk::LocalVariationImageFilter< TInputImage, TOutputImage >::InputSizeType |
Definition at line 80 of file itkLocalVariationImageFilter.h.
| typedef OutputImageType::RegionType itk::LocalVariationImageFilter< TInputImage, TOutputImage >::OutputImageRegionType |
Definition at line 78 of file itkLocalVariationImageFilter.h.
| typedef TOutputImage itk::LocalVariationImageFilter< TInputImage, TOutputImage >::OutputImageType |
Definition at line 59 of file itkLocalVariationImageFilter.h.
| typedef OutputImageType::PixelType itk::LocalVariationImageFilter< TInputImage, TOutputImage >::OutputPixelType |
Definition at line 75 of file itkLocalVariationImageFilter.h.
| typedef SmartPointer<Self> itk::LocalVariationImageFilter< TInputImage, TOutputImage >::Pointer |
Definition at line 64 of file itkLocalVariationImageFilter.h.
| typedef LocalVariationImageFilter itk::LocalVariationImageFilter< TInputImage, TOutputImage >::Self |
Standard class typedefs.
Definition at line 62 of file itkLocalVariationImageFilter.h.
| typedef ImageToImageFilter< InputImageType, OutputImageType> itk::LocalVariationImageFilter< TInputImage, TOutputImage >::Superclass |
Definition at line 63 of file itkLocalVariationImageFilter.h.
| itk::LocalVariationImageFilter< TInputImage, TOutputImage >::LocalVariationImageFilter | ( | ) | [protected] |
Definition at line 37 of file itkLocalVariationImageFilter.txx.
{}
| virtual itk::LocalVariationImageFilter< TInputImage, TOutputImage >::~LocalVariationImageFilter | ( | ) | [inline, protected, virtual] |
Definition at line 93 of file itkLocalVariationImageFilter.h.
{}
| void itk::LocalVariationImageFilter< TInputImage, TOutputImage >::GenerateInputRequestedRegion | ( | ) | throw (InvalidRequestedRegionError) [virtual] |
MedianImageFilter needs a larger input requested region than the output requested region. As such, MedianImageFilter needs to provide an implementation for GenerateInputRequestedRegion() in order to inform the pipeline execution model.
Definition at line 43 of file itkLocalVariationImageFilter.txx.
{
// call the superclass' implementation of this method
Superclass::GenerateInputRequestedRegion();
// get pointers to the input and output
typename Superclass::InputImagePointer inputPtr =
const_cast< TInputImage * >( this->GetInput() );
typename Superclass::OutputImagePointer outputPtr = this->GetOutput();
if ( !inputPtr || !outputPtr )
{
return;
}
// get a copy of the input requested region (should equal the output
// requested region)
typename TInputImage::RegionType inputRequestedRegion;
inputRequestedRegion = inputPtr->GetRequestedRegion();
// pad the input requested region by 1
inputRequestedRegion.PadByRadius( 1 );
// crop the input requested region at the input's largest possible region
if ( inputRequestedRegion.Crop(inputPtr->GetLargestPossibleRegion()) )
{
inputPtr->SetRequestedRegion( inputRequestedRegion );
return;
}
else
{
// Couldn't crop the region (requested region is outside the largest
// possible region). Throw an exception.
// store what we tried to request (prior to trying to crop)
inputPtr->SetRequestedRegion( inputRequestedRegion );
// build an exception
InvalidRequestedRegionError e(__FILE__, __LINE__);
e.SetLocation(ITK_LOCATION);
e.SetDescription("Requested region outside possible region.");
e.SetDataObject(inputPtr);
throw e;
}
}
| virtual const char* itk::LocalVariationImageFilter< TInputImage, TOutputImage >::GetClassName | ( | ) | const [virtual] |
Run-time type information (and related methods).
| itk::LocalVariationImageFilter< TInputImage, TOutputImage >::itkStaticConstMacro | ( | OutputImageDimension | , |
| unsigned | int, | ||
| TOutputImage::ImageDimension | |||
| ) |
| itk::LocalVariationImageFilter< TInputImage, TOutputImage >::itkStaticConstMacro | ( | InputImageDimension | , |
| unsigned | int, | ||
| TInputImage::ImageDimension | |||
| ) |
Extract dimension from input and output image.
| static Pointer itk::LocalVariationImageFilter< TInputImage, TOutputImage >::New | ( | ) | [static] |
Method for creation through the object factory.
| void itk::LocalVariationImageFilter< TInputImage, TOutput >::PrintSelf | ( | std::ostream & | os, |
| Indent | indent | ||
| ) | const [protected] |
Standard "PrintSelf" method
Definition at line 202 of file itkLocalVariationImageFilter.txx.
{
Superclass::PrintSelf( os, indent );
}
| void itk::LocalVariationImageFilter< TInputImage, TOutputImage >::ThreadedGenerateData | ( | const OutputImageRegionType & | outputRegionForThread, |
| int | threadId | ||
| ) | [protected] |
MedianImageFilter can be implemented as a multithreaded filter. Therefore, this implementation provides a ThreadedGenerateData() routine which is called for each processing thread. The output image data is allocated automatically by the superclass prior to calling ThreadedGenerateData(). ThreadedGenerateData can only write to the portion of the output image specified by the parameter "outputRegionForThread"
Definition at line 110 of file itkLocalVariationImageFilter.txx.
References QuadProgPP::sqrt().
{
// Allocate output
typename OutputImageType::Pointer output = this->GetOutput();
typename InputImageType::ConstPointer input = this->GetInput();
itk::Size<InputImageDimension> size;
for( int i=0; i<InputImageDimension; i++)
size[i] = 1;
// Find the data-set boundary "faces"
NeighborhoodAlgorithm::ImageBoundaryFacesCalculator<InputImageType> bC;
typename NeighborhoodAlgorithm::
ImageBoundaryFacesCalculator<InputImageType>::FaceListType
faceList = bC(input, outputRegionForThread, size);
// support progress methods/callbacks
ProgressReporter progress(
this, threadId, outputRegionForThread.GetNumberOfPixels());
ZeroFluxNeumannBoundaryCondition<InputImageType> nbc;
std::vector<InputPixelType> pixels;
// Process each of the boundary faces. These are N-d regions which border
// the edge of the buffer.
for ( typename NeighborhoodAlgorithm::
ImageBoundaryFacesCalculator<InputImageType>::FaceListType::iterator
fit=faceList.begin(); fit != faceList.end(); ++fit)
{
// iterators over output and input
ImageRegionIterator<OutputImageType>
output_image_it(output, *fit);
ImageRegionConstIterator<InputImageType>
input_image_it(input.GetPointer(), *fit);
// neighborhood iterator for input image
ConstShapedNeighborhoodIterator<InputImageType>
input_image_neighbors_it(size, input, *fit);
typename ConstShapedNeighborhoodIterator<InputImageType>::
OffsetType offset;
input_image_neighbors_it.OverrideBoundaryCondition(&nbc);
input_image_neighbors_it.ClearActiveList();
for(int i=0; i<InputImageDimension; i++)
{
offset.Fill(0);
offset[i] = -1;
input_image_neighbors_it.ActivateOffset(offset);
offset[i] = 1;
input_image_neighbors_it.ActivateOffset(offset);
}
input_image_neighbors_it.GoToBegin();
//const unsigned int neighborhoodSize = InputImageDimension*2;
while ( ! input_image_neighbors_it.IsAtEnd() )
{
// collect all the pixels in the neighborhood, note that we use
// GetPixel on the NeighborhoodIterator to honor the boundary conditions
typename OutputImageType::PixelType locVariation = 0;
typename ConstShapedNeighborhoodIterator<InputImageType>::
ConstIterator input_neighbors_it;
for (input_neighbors_it = input_image_neighbors_it.Begin();
! input_neighbors_it.IsAtEnd();
input_neighbors_it++)
{
typename TInputImage::PixelType diffVec =
input_neighbors_it.Get()-input_image_it.Get();
locVariation += SquaredEuclideanMetric
<typename TInputImage::PixelType>::Calc(diffVec);
}
locVariation = sqrt(locVariation + 0.0001);
output_image_it.Set(locVariation);
// update iterators
++input_image_neighbors_it;
++output_image_it;
++input_image_it;
// report progress
progress.CompletedPixel();
}
}
}
1.7.2