cmtkImageOperationApplyMask.cxx

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/*
//
//  Copyright 2010 SRI International
//
//  This file is part of the Computational Morphometry Toolkit.
//
//  http://www.nitrc.org/projects/cmtk/
//
//  The Computational Morphometry Toolkit is free software: you can
//  redistribute it and/or modify it under the terms of the GNU General Public
//  License as published by the Free Software Foundation, either version 3 of
//  the License, or (at your option) any later version.
//
//  The Computational Morphometry Toolkit is distributed in the hope that it
//  will be useful, but WITHOUT ANY WARRANTY; without even the implied
//  warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License along
//  with the Computational Morphometry Toolkit.  If not, see
//  <http://www.gnu.org/licenses/>.
//
//  $Revision: 2398 $
//
//  $LastChangedDate: 2010-10-05 14:54:37 -0700 (Tue, 05 Oct 2010) $
//
//  $LastChangedBy: torstenrohlfing $
//
*/

#include "cmtkImageOperationApplyMask.h"

#include <IO/cmtkVolumeIO.h>

cmtk::UniformVolume::SmartPtr
cmtk::ImageOperationApplyMask
::Apply( cmtk::UniformVolume::SmartPtr& volume )
{
  const std::string maskOrientation = this->m_MaskVolume->m_MetaInformation[META_IMAGE_ORIENTATION];
  const std::string workingOrientation = volume->m_MetaInformation[META_IMAGE_ORIENTATION];
  if ( maskOrientation != workingOrientation )
    {
    this->m_MaskVolume = cmtk::UniformVolume::SmartPtr( this->m_MaskVolume->GetReoriented( workingOrientation.c_str() ) );
    }
  
  for ( int dim = 0; dim < 3; ++dim )
    {
    if ( this->m_MaskVolume->m_Dims[dim] != volume->m_Dims[dim] )
      {
      cmtk::StdErr << "ERROR: mask volume dimensions do not match working volume dimensions.\n";
      exit( 1 );
      }
    }
  
  const cmtk::TypedArray* maskData = this->m_MaskVolume->GetData();
  cmtk::TypedArray::SmartPtr& volumeData = volume->GetData();
  
  const size_t nPixels = volume->GetNumberOfPixels();
  for ( size_t i = 0; i < nPixels; ++i )
    if ( maskData->IsPaddingOrZeroAt( i ) ) 
      volumeData->SetPaddingAt( i );
  return volume;
}

cmtk::UniformVolume::SmartPtr 
cmtk::ImageOperationApplyMask
::ReadMaskFile( const char* maskFileName, const bool inverse )
{
  cmtk::UniformVolume::SmartPtr maskVolume( cmtk::VolumeIO::ReadOriented( maskFileName ) );
  if ( !maskVolume || !maskVolume->GetData() ) 
    {
    cmtk::StdErr << "ERROR: could not read mask from file " << maskFileName << "\nProgram will terminate now, just to be safe.\n";
    exit( 1 );
    }
  
  // binarize mask to 1/0, convert to char, and also consider "inverse" flag in the process.
  cmtk::TypedArray::SmartPtr& maskData = maskVolume->GetData();
  const size_t nPixels = maskData->GetDataSize();
  for ( size_t n = 0; n < nPixels; ++n )
    {
    if ( maskData->IsPaddingOrZeroAt( n ) == inverse ) 
      maskData->Set( 1, n );
    else
      maskData->Set( 0, n );
    }
  maskVolume->SetData( cmtk::TypedArray::SmartPtr( maskData->Convert( cmtk::TYPE_BYTE ) ) );
  
  return maskVolume;
}