C++ Pointer::Expand方法代码示例

/**
 3.1 Create a skeletonization of the segmentation and try to find a nice cut
   3.1.1 Call a ipSegmentation algorithm to create a nice cut
   3.1.2 Set the result of this algorithm as the feedback contour
*/
bool mitk::RegionGrowingTool::OnMousePressedInside( StateMachineAction*, InteractionEvent* interactionEvent, mitkIpPicDescriptor* workingPicSlice, int initialWorkingOffset)
{
  if ( SegTool2D::CanHandleEvent(interactionEvent) < 1.0 )
      return false;

  mitk::InteractionPositionEvent* positionEvent = dynamic_cast<mitk::InteractionPositionEvent*>( interactionEvent );
  //const PositionEvent* positionEvent = dynamic_cast<const PositionEvent*>(stateEvent->GetEvent()); // checked in OnMousePressed
  // 3.1.1. Create a skeletonization of the segmentation and try to find a nice cut
  // apply the skeletonization-and-cut algorithm
  // generate contour to remove
  // set m_ReferenceSlice = NULL so nothing will happen during mouse move
  // remember to fill the contour with 0 in mouserelease
  mitkIpPicDescriptor* segmentationHistory = ipMITKSegmentationCreateGrowerHistory( workingPicSlice, m_LastWorkingSeed, NULL ); // free again
  if (segmentationHistory)
  {
    tCutResult cutContour = ipMITKSegmentationGetCutPoints( workingPicSlice, segmentationHistory, initialWorkingOffset ); // tCutResult is a ipSegmentation type
    mitkIpPicFree( segmentationHistory );
    if (cutContour.cutIt)
    {
      int timestep = positionEvent->GetSender()->GetTimeStep();
      // 3.1.2 copy point from float* to mitk::Contour
      ContourModel::Pointer contourInImageIndexCoordinates = ContourModel::New();
      contourInImageIndexCoordinates->Expand(timestep + 1);
      contourInImageIndexCoordinates->SetClosed(true, timestep);
      Point3D newPoint;
      for (int index = 0; index < cutContour.deleteSize; ++index)
      {
        newPoint[0] = cutContour.deleteCurve[ 2 * index + 0 ] - 0.5;//correction is needed because the output of the algorithm is center based
        newPoint[1] = cutContour.deleteCurve[ 2 * index + 1 ] - 0.5;//and we want our contour displayed corner based.
        newPoint[2] = 0.0;

        contourInImageIndexCoordinates->AddVertex( newPoint, timestep );
      }

      free(cutContour.traceline);
      free(cutContour.deleteCurve); // perhaps visualize this for fun?
      free(cutContour.onGradient);

      ContourModel::Pointer contourInWorldCoordinates = FeedbackContourTool::BackProjectContourFrom2DSlice( m_WorkingSlice->GetGeometry(), contourInImageIndexCoordinates, true ); // true: sub 0.5 for ipSegmentation correction

      FeedbackContourTool::SetFeedbackContour( *contourInWorldCoordinates );
      FeedbackContourTool::SetFeedbackContourVisible(true);
      mitk::RenderingManager::GetInstance()->RequestUpdate( positionEvent->GetSender()->GetRenderWindow() );
      m_FillFeedbackContour = true;
    }
    else
    {
      m_FillFeedbackContour = false;
    }

  }
  else
  {
    m_FillFeedbackContour = false;
  }

  m_ReferenceSlice = NULL;

  return true;
}

/**
Uses ipSegmentation algorithms to do the actual region growing. The result (binary image) is first smoothed by a 5x5 circle mask, then
its contour is extracted and converted to MITK coordinates.
*/
mitkIpPicDescriptor* mitk::RegionGrowingTool::PerformRegionGrowingAndUpdateContour(int timestep)
{
  // 1. m_OriginalPicSlice and m_SeedPointMemoryOffset are set to sensitive values, as well as m_LowerThreshold and m_UpperThreshold
  assert (m_OriginalPicSlice);
  if (m_OriginalPicSlice->n[0] != 256 || m_OriginalPicSlice->n[1] != 256) // ???
  assert( (m_SeedPointMemoryOffset < static_cast<int>( m_OriginalPicSlice->n[0] * m_OriginalPicSlice->n[1] )) && (m_SeedPointMemoryOffset >= 0) ); // inside the image

  // 2. ipSegmentation is used to perform region growing
  float ignored;
  int oneContourOffset( 0 );
  mitkIpPicDescriptor* regionGrowerResult = ipMITKSegmentationGrowRegion4N( m_OriginalPicSlice,
                                                                        m_SeedPointMemoryOffset,       // seed point
                                                                        true,              // grayvalue interval relative to seed point gray value?
                                                                        m_LowerThreshold,
                                                                        m_UpperThreshold,
                                                                        0,                  // continue until done (maxIterations == 0)
                                                                        NULL,               // allocate new memory (only this time, on mouse move we'll reuse the old buffer)
                                                                        oneContourOffset,   // a pixel that is near the resulting contour
                                                                        ignored             // ignored by us
                                                                      );

  if (!regionGrowerResult || oneContourOffset == -1)
  {
    ContourModel::Pointer dummyContour = ContourModel::New();
    dummyContour->Initialize();
    FeedbackContourTool::SetFeedbackContour( *dummyContour );

    if (regionGrowerResult) ipMITKSegmentationFree(regionGrowerResult);
    return NULL;
  }

  // 3. We smooth the result a little to reduce contour complexity
  bool smoothResult( true ); // currently fixed, perhaps remove else block
  mitkIpPicDescriptor* smoothedRegionGrowerResult;
  if (smoothResult)
  {
    // Smooth the result (otherwise very detailed contour)
    smoothedRegionGrowerResult = SmoothIPPicBinaryImage( regionGrowerResult, oneContourOffset );

    ipMITKSegmentationFree( regionGrowerResult );
  }
  else
  {
    smoothedRegionGrowerResult = regionGrowerResult;
  }

  // 4. convert the result of region growing into a mitk::Contour
  // At this point oneContourOffset could be useless, if smoothing destroyed a thin bridge. In these
  // cases, we have two or more unconnected segmentation regions, and we don't know, which one is touched by oneContourOffset.
  // In the bad case, the contour is not the one around our seedpoint, so the result looks very strange to the user.
  // -> we remove the point where the contour started so far. Then we look from the bottom of the image for the first segmentation pixel
  //    and start another contour extraction from there. This is done, until the seedpoint is inside the contour
  int numberOfContourPoints( 0 );
  int newBufferSize( 0 );
  float* contourPoints = ipMITKSegmentationGetContour8N( smoothedRegionGrowerResult, oneContourOffset, numberOfContourPoints, newBufferSize ); // memory allocated with malloc
  if (contourPoints)
  {
    while ( !ipMITKSegmentationIsInsideContour( contourPoints,                                               // contour
                                                numberOfContourPoints,                                       // points in contour
                                                m_SeedPointMemoryOffset % smoothedRegionGrowerResult->n[0],  // test point x
                                                m_SeedPointMemoryOffset / smoothedRegionGrowerResult->n[0]   // test point y
                                              ) )
    {
      // we decide that this cannot be part of the segmentation because the seedpoint is not contained in the contour (fill the 4-neighborhood with 0)
      ipMITKSegmentationReplaceRegion4N( smoothedRegionGrowerResult, oneContourOffset, 0 );

      // move the contour offset to the last row (x position of the seed point)
      int rowLength = smoothedRegionGrowerResult->n[0]; // number of pixels in a row
      oneContourOffset =    m_SeedPointMemoryOffset % smoothedRegionGrowerResult->n[0]  // x of seed point
                          + rowLength*(smoothedRegionGrowerResult->n[1]-1);              // y of last row

      while (    oneContourOffset >=0
              && (*(static_cast<ipMITKSegmentationTYPE*>(smoothedRegionGrowerResult->data) + oneContourOffset) == 0) )
      {
        oneContourOffset -= rowLength; // if pixel at data+oneContourOffset is 0, then move up one row
      }

      if ( oneContourOffset < 0 )
      {
        break; // just use the last contour we found
      }

      free(contourPoints); // release contour memory
      contourPoints = ipMITKSegmentationGetContour8N( smoothedRegionGrowerResult, oneContourOffset, numberOfContourPoints, newBufferSize ); // memory allocated with malloc
    }

    // copy point from float* to mitk::Contour
    ContourModel::Pointer contourInImageIndexCoordinates = ContourModel::New();
    contourInImageIndexCoordinates->Expand(timestep + 1);
    contourInImageIndexCoordinates->SetClosed(true, timestep);
    Point3D newPoint;
    for (int index = 0; index < numberOfContourPoints; ++index)
    {
      newPoint[0] = contourPoints[ 2 * index + 0 ] - 0.5;//correction is needed because the output of the algorithm is center based
      newPoint[1] = contourPoints[ 2 * index + 1 ] - 0.5;//and we want our contour displayed corner based.
      newPoint[2] = 0;
//.........这里部分代码省略.........

/**
  Insert the point to the feedback contour,finish to build the contour and at the same time the painting function
  */
void mitk::PaintbrushTool::MouseMoved(mitk::InteractionEvent* interactionEvent, bool leftMouseButtonPressed)
{
  mitk::InteractionPositionEvent* positionEvent = dynamic_cast<mitk::InteractionPositionEvent*>( interactionEvent );

  CheckIfCurrentSliceHasChanged( positionEvent );

  if ( m_LastContourSize != m_Size )
  {
    UpdateContour( positionEvent );
    m_LastContourSize = m_Size;
  }

  Point3D worldCoordinates = positionEvent->GetPositionInWorld();
  Point3D indexCoordinates;

  m_WorkingSlice->GetGeometry()->WorldToIndex( worldCoordinates, indexCoordinates );

  MITK_DEBUG << "Mouse at W " << worldCoordinates << std::endl;
  MITK_DEBUG << "Mouse at I " << indexCoordinates << std::endl;

  // round to nearest voxel center (abort if this hasn't changed)
  if ( m_Size % 2 == 0 ) // even
  {
    indexCoordinates[0] = ROUND( indexCoordinates[0]);// /*+ 0.5*/) + 0.5;
    indexCoordinates[1] = ROUND( indexCoordinates[1]);// /*+ 0.5*/ ) + 0.5;
  }
  else // odd
  {
    indexCoordinates[0] = ROUND( indexCoordinates[0]  ) ;
    indexCoordinates[1] = ROUND( indexCoordinates[1] ) ;
  }

  static Point3D lastPos; // uninitialized: if somebody finds out how this can be initialized in a one-liner, tell me
  if ( fabs(indexCoordinates[0] - lastPos[0]) > mitk::eps ||
       fabs(indexCoordinates[1] - lastPos[1]) > mitk::eps ||
       fabs(indexCoordinates[2] - lastPos[2]) > mitk::eps ||
       leftMouseButtonPressed
     )
  {
    lastPos = indexCoordinates;
  }
  else
  {
    MITK_DEBUG << "." << std::flush;
    return;
  }

  MITK_DEBUG << "Mouse at C " << indexCoordinates;

  int timestep = positionEvent->GetSender()->GetTimeStep();

  ContourModel::Pointer contour = ContourModel::New();
  contour->Expand(timestep + 1);
  contour->SetClosed(true, timestep);

  ContourModel::VertexIterator it = m_MasterContour->Begin();
  ContourModel::VertexIterator end = m_MasterContour->End();

  while(it != end)
  {
    Point3D point = (*it)->Coordinates;
    point[0] += indexCoordinates[ 0 ];
    point[1] += indexCoordinates[ 1 ];

    contour->AddVertex( point, timestep );
    it++;
  }


  if (leftMouseButtonPressed)
  {
    FeedbackContourTool::FillContourInSlice( contour, timestep, m_WorkingSlice, m_PaintingPixelValue );
    m_WorkingNode->SetData(m_WorkingSlice);
    m_WorkingNode->Modified();
  }

  // visualize contour
  ContourModel::Pointer displayContour = this->GetFeedbackContour();
  displayContour->Clear();

  ContourModel::Pointer tmp = FeedbackContourTool::BackProjectContourFrom2DSlice( m_WorkingSlice->GetGeometry(), /*displayContour*/contour );

  // copy transformed contour into display contour
  it =  tmp->Begin();
  end = tmp->End();

  while(it != end)
  {
    Point3D point = (*it)->Coordinates;

    displayContour->AddVertex( point, timestep );
    it++;
  }

  m_FeedbackContourNode->GetData()->Modified();

  assert( positionEvent->GetSender()->GetRenderWindow() );
//.........这里部分代码省略.........

//.........这里部分代码省略.........
  {
    unsigned int lastValidPixel = size-1; // initialization, will be changed lateron
    bool inSeg = true;    // inside segmentation?
    for ( ; oneContourOffset < size; ++oneContourOffset )
    {
      if ( ( data[oneContourOffset] == 0 ) && inSeg ) // pixel 0 and inside-flag set: this happens at the first pixel outside a filled region
      {
        inSeg = false;
        lastValidPixel = oneContourOffset - 1; // store the last pixel position inside a filled region
        break;
      }
      else // pixel 1, inside-flag doesn't matter: this happens while we are inside a filled region
      {
        inSeg = true; // first iteration lands here
      }

    }
    oneContourOffset = lastValidPixel;
  }
  else
  {
    MITK_ERROR << "Fill/Erase was never intended to work with other than binary images." << std::endl;
    m_FillContour = false;
    return false;
  }

  if (oneContourOffset == size) // nothing found until end of slice
  {
    m_FillContour = false;
    return false;
  }

  int numberOfContourPoints( 0 );
  int newBufferSize( 0 );
  //MITK_INFO << "getting contour from offset " << oneContourOffset << " ("<<oneContourOffset%originalPicSlice->n[0]<<","<<oneContourOffset/originalPicSlice->n[0]<<")"<<std::endl;
  float* contourPoints = ipMITKSegmentationGetContour8N( originalPicSlice, oneContourOffset, numberOfContourPoints, newBufferSize ); // memory allocated with malloc

  //MITK_INFO << "contourPoints " << contourPoints << " (N="<<numberOfContourPoints<<")"<<std::endl;
  assert(contourPoints == NULL || numberOfContourPoints > 0);

  bool cursorInsideContour = ipMITKSegmentationIsInsideContour( contourPoints, numberOfContourPoints, projectedPointIn2D[0], projectedPointIn2D[1]);

  // decide if contour should be filled or not
  m_FillContour = cursorInsideContour;

  if (m_FillContour)
  {
    // copy point from float* to mitk::Contour
    ContourModel::Pointer contourInImageIndexCoordinates = ContourModel::New();
    contourInImageIndexCoordinates->Expand(timeStep + 1);
    contourInImageIndexCoordinates->SetClosed(true, timeStep);
    Point3D newPoint;
    for (int index = 0; index < numberOfContourPoints; ++index)
    {
      newPoint[0] = contourPoints[ 2 * index + 0 ] - 0.5;
      newPoint[1] = contourPoints[ 2 * index + 1] - 0.5;
      newPoint[2] = 0;

      contourInImageIndexCoordinates->AddVertex(newPoint, timeStep);
    }

    m_SegmentationContourInWorldCoordinates = FeedbackContourTool::BackProjectContourFrom2DSlice( workingSlice->GetGeometry(), contourInImageIndexCoordinates, true ); // true, correct the result from ipMITKSegmentationGetContour8N

    // 3. Show the contour
    FeedbackContourTool::SetFeedbackContour( *m_SegmentationContourInWorldCoordinates );

    FeedbackContourTool::SetFeedbackContourVisible(true);
    mitk::RenderingManager::GetInstance()->RequestUpdate(positionEvent->GetSender()->GetRenderWindow());
  }

  // always generate a second contour, containing the whole image (used when CTRL is pressed)
  {
    // copy point from float* to mitk::Contour
    ContourModel::Pointer contourInImageIndexCoordinates = ContourModel::New();
    contourInImageIndexCoordinates->Expand(timeStep + 1);
    contourInImageIndexCoordinates->SetClosed(true, timeStep);
    Point3D newPoint;
    newPoint[0] = 0; newPoint[1] = 0; newPoint[2] = 0.0;
    contourInImageIndexCoordinates->AddVertex( newPoint, timeStep );
    newPoint[0] = originalPicSlice->n[0]; newPoint[1] = 0; newPoint[2] = 0.0;
    contourInImageIndexCoordinates->AddVertex( newPoint, timeStep );
    newPoint[0] = originalPicSlice->n[0]; newPoint[1] = originalPicSlice->n[1]; newPoint[2] = 0.0;
    contourInImageIndexCoordinates->AddVertex( newPoint, timeStep );
    newPoint[0] = 0; newPoint[1] = originalPicSlice->n[1]; newPoint[2] = 0.0;
    contourInImageIndexCoordinates->AddVertex( newPoint, timeStep );

    m_WholeImageContourInWorldCoordinates = FeedbackContourTool::BackProjectContourFrom2DSlice( workingSlice->GetGeometry(), contourInImageIndexCoordinates, true ); // true, correct the result from ipMITKSegmentationGetContour8N

    // 3. Show the contour
    FeedbackContourTool::SetFeedbackContour( *m_SegmentationContourInWorldCoordinates );

    FeedbackContourTool::SetFeedbackContourVisible(true);
    mitk::RenderingManager::GetInstance()->RequestUpdate(positionEvent->GetSender()->GetRenderWindow());
  }


  free(contourPoints);

  return true;
}