#include "OtsuThresholdImageFilter.h"
#include <cpPlugins/Interface/Image.h>

#include <itkOtsuThresholdImageFilter.h>

// -------------------------------------------------------------------------
cpPlugins::BasicFilters::OtsuThresholdImageFilter::
OtsuThresholdImageFilter( )
  : Superclass( )
{
  this->SetNumberOfInputs( 1 );
  this->SetNumberOfOutputs( 1 );
  this->_MakeOutput< cpPlugins::Interface::Image >( 0 );

  this->m_Parameters->ConfigureAsUint( "NumberOfHistogramBins", 100 );
  this->m_Parameters->ConfigureAsUint( "InsideValue", 255 );
  this->m_Parameters->ConfigureAsUint( "OutsideValue", 0 );
}

// -------------------------------------------------------------------------
cpPlugins::BasicFilters::OtsuThresholdImageFilter::
~OtsuThresholdImageFilter( )
{
}

// -------------------------------------------------------------------------
std::string cpPlugins::BasicFilters::OtsuThresholdImageFilter::
_GenerateData( )
{
  cpPlugins::Interface::Image* image =
    this->GetInput< cpPlugins::Interface::Image >( 0 );
  if( image == NULL )
    return( "OtsuThresholdImageFilter: No input image." );

  itk::DataObject* itk_image = NULL;
  std::string r = "";
  cpPlugins_Image_Demangle_AllScalarTypes( 2, image, itk_image, r, _GD0 );
  else cpPlugins_Image_Demangle_AllScalarTypes( 3, image, itk_image, r, _GD0 );
  else cpPlugins_Image_Demangle_AllScalarTypes( 4, image, itk_image, r, _GD0 );
  else r = "OtsuThresholdImageFilter: Input image type not supported.";
  return( r );
}

// -------------------------------------------------------------------------
template< class I >
std::string cpPlugins::BasicFilters::OtsuThresholdImageFilter::
_GD0( itk::DataObject* image )
{
  return(
    this->_RealGD< I, itk::Image< unsigned char, I::ImageDimension > >(
      image
      )
    );
}

// -------------------------------------------------------------------------
template< class I, class O >
inline std::string cpPlugins::BasicFilters::OtsuThresholdImageFilter::
_RealGD( itk::DataObject* image )
{
  typedef itk::OtsuThresholdImageFilter< I, O > _F;
  typedef typename O::PixelType _OP;

  // Get parameters
  unsigned int bins = this->m_Parameters->GetUint( "NumberOfHistogramBins" );
  _OP in_val = _OP( this->m_Parameters->GetUint( "InsideValue" ) );
  _OP out_val = _OP( this->m_Parameters->GetUint( "OutsideValue" ) );

  // Configure filter
  _F* filter = this->_CreateITK< _F >( );
  filter->SetInput( dynamic_cast< I* >( image ) );
  filter->SetNumberOfHistogramBins( bins );
  filter->SetInsideValue( in_val );
  filter->SetOutsideValue( out_val );
  filter->Update( );

  // Connect output
  cpPlugins::Interface::Image* out =
    this->GetOutput< cpPlugins::Interface::Image >( 0 );
  if( out != NULL )
  {
    out->SetITK< O >( filter->GetOutput( ) );
    return( "" );
  }
  else
    return( "OtsuThresholdImageFilter: output not correctly created." );
}

// eof - $RCSfile$