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/*=========================================================================
Copyright (c) Kitware, Inc.
All rights reserved.
See Copyright.txt or http://www.kitware.com/VolViewCopyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
/** Generic interface for protocol communication between an ITK filter
and the VolView Plugin Interface */
#ifndef _itkVVWatershedRGBModule_txx
#define _itkVVWatershedRGBModule_txx
#include "vvITKWatershedRGBModule.h"
#include <set>
#include <fstream>
namespace VolView
{
namespace PlugIn
{
/*
* Constructor
*/
template <class TInputPixelType >
WatershedRGBModule<TInputPixelType>
::WatershedRGBModule()
{
m_ImportFilter = ImportFilterType::New();
m_CastFilter = CastFilterType::New();
m_WatershedFilter = WatershedFilterType::New();
m_ColorEncoder = ColorMapFilterType::New();
m_CastFilter->SetInput( m_ImportFilter->GetOutput() );
m_WatershedFilter->SetInput( m_CastFilter->GetOutput() );
m_ColorEncoder->SetInput( m_WatershedFilter->GetOutput() );
// Allow progressive release of memory as the pipeline is executed
m_CastFilter->ReleaseDataFlagOn();
m_WatershedFilter->ReleaseDataFlagOn();
}
/*
* Destructor
*/
template <class TInputPixelType >
WatershedRGBModule<TInputPixelType>
::~WatershedRGBModule()
{
}
/*
* Set the lowest value of the basin border to be segmented
*/
template <class TInputPixelType >
void
WatershedRGBModule<TInputPixelType>
::SetWaterLevel( float value )
{
m_WatershedFilter->SetLevel( value );
m_WatershedFilter->SetThreshold( value / 10.0 );
}
/*
* Performs the actual filtering on the data
*/
template <class TInputPixelType >
void
WatershedRGBModule<TInputPixelType>
::ProcessData( const vtkVVProcessDataStruct * pds )
{
SizeType size;
IndexType start;
double origin[3];
double spacing[3];
const vtkVVPluginInfo * info = this->GetPluginInfo();
size[0] = info->InputVolumeDimensions[0];
size[1] = info->InputVolumeDimensions[1];
size[2] = info->InputVolumeDimensions[2];
for(unsigned int i=0; i<3; i++)
{
origin[i] = info->InputVolumeOrigin[i];
spacing[i] = info->InputVolumeSpacing[i];
start[i] = 0;
}
RegionType region;
region.SetIndex( start );
region.SetSize( size );
m_ImportFilter->SetSpacing( spacing );
m_ImportFilter->SetOrigin( origin );
m_ImportFilter->SetRegion( region );
const unsigned int totalNumberOfPixels = region.GetNumberOfPixels();
const bool importFilterWillDeleteTheInputBuffer = false;
const unsigned int numberOfPixelsPerSlice = size[0] * size[1];
InputPixelType * dataBlockStart =
static_cast< InputPixelType * >( pds->inData )
+ numberOfPixelsPerSlice * pds->StartSlice;
m_ImportFilter->SetImportPointer( dataBlockStart,
totalNumberOfPixels,
importFilterWillDeleteTheInputBuffer );
// Set the Observer for updating progress in the GUI
m_CastFilter->AddObserver( itk::ProgressEvent(), this->GetCommandObserver() );
m_WatershedFilter->AddObserver( itk::ProgressEvent(), this->GetCommandObserver() );
m_ColorEncoder->AddObserver( itk::ProgressEvent(), this->GetCommandObserver() );
m_CastFilter->AddObserver( itk::StartEvent(), this->GetCommandObserver() );
m_WatershedFilter->AddObserver( itk::StartEvent(), this->GetCommandObserver() );
m_ColorEncoder->AddObserver( itk::StartEvent(), this->GetCommandObserver() );
m_CastFilter->AddObserver( itk::EndEvent(), this->GetCommandObserver() );
m_WatershedFilter->AddObserver( itk::EndEvent(), this->GetCommandObserver() );
m_ColorEncoder->AddObserver( itk::EndEvent(), this->GetCommandObserver() );
// Execute the filters and progressively remove temporary memory
this->SetCurrentFilterProgressWeight( 0.1 );
this->SetUpdateMessage("Preprocessing with casting filter...");
m_CastFilter->Update();
this->SetCurrentFilterProgressWeight( 0.8 );
this->SetUpdateMessage("Computing watersheds...");
m_WatershedFilter->Update();
this->SetCurrentFilterProgressWeight( 0.1 );
this->SetUpdateMessage("Postprocessing for color coding...");
m_ColorEncoder->Update();
this->CopyOutputData( pds );
} // end of ProcessData
/*
* Performs post-processing of data.
* This involves an intensity window operation and
* data copying into the volview provided buffer.
*/
template <class TInputPixelType >
void
WatershedRGBModule<TInputPixelType>
::CopyOutputData( const vtkVVProcessDataStruct * pds )
{
this->SetUpdateMessage("Copying output data ...");
// Copy the data (with casting) to the output buffer provided by the Plug In API
typename RGBImageType::ConstPointer outputImage = m_ColorEncoder->GetOutput();
typedef itk::ImageRegionConstIterator< RGBImageType > OutputIteratorType;
OutputIteratorType ot( outputImage, outputImage->GetBufferedRegion() );
OutputPixelType * outData = (OutputPixelType *)(pds->outData);
ot.GoToBegin();
while( !ot.IsAtEnd() )
{
const RGBPixelType pixel = ot.Get();
*outData = static_cast< OutputPixelType >( pixel.GetRed() ); // copy input pixel
++outData;
*outData = static_cast< OutputPixelType >( pixel.GetGreen() ); // copy input pixel
++outData;
*outData = static_cast< OutputPixelType >( pixel.GetBlue() ); // copy input pixel
++outData;
++ot;
}
} // end of CopyOutputData
} // end of namespace PlugIn
} // end of namespace Volview
#endif
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