7 #include <itkImageToVTKImageFilter.h>
8 #include <itkRGBPixel.h>
10 #include <itkImageFileReader.h>
12 #include <vtkCamera.h>
13 #include <vtkImageActor.h>
14 #include <vtkInteractorStyleImage.h>
15 #include <vtkPointHandleRepresentation3D.h>
16 #include <vtkProperty.h>
17 #include <vtkRenderer.h>
18 #include <vtkRenderWindow.h>
19 #include <vtkRenderWindowInteractor.h>
20 #include <vtkSeedRepresentation.h>
21 #include <vtkSeedWidget.h>
22 #include <vtkSmartPointer.h>
24 #include <fpa/Image/RegionGrow.h>
25 #include <fpa/Base/Functors/TautologyFunction.h>
26 #include <fpa/VTK/Image2DObserver.h>
28 // -------------------------------------------------------------------------
29 const unsigned int Dim = 2;
30 typedef unsigned char TPixel;
32 typedef itk::Image< itk::RGBPixel< TPixel >, Dim > TColorImage;
33 typedef itk::Image< TPixel, Dim > TImage;
34 typedef itk::ImageToVTKImageFilter< TColorImage > TVTKImage;
36 // -------------------------------------------------------------------------
37 int main( int argc, char* argv[] )
42 << "Usage: " << argv[ 0 ]
43 << " input_image neighborhood_order stop_at_one_front"
48 std::string input_image_fn = argv[ 1 ];
49 unsigned int neighborhood_order = std::atoi( argv[ 2 ] );
50 bool stop_at_one_front = ( std::atoi( argv[ 3 ] ) != 0 );
53 itk::ImageFileReader< TColorImage >::Pointer input_image_reader =
54 itk::ImageFileReader< TColorImage >::New( );
55 input_image_reader->SetFileName( input_image_fn );
58 input_image_reader->Update( );
60 catch( itk::ExceptionObject& err )
63 << "Error while reading image from " << input_image_fn << ": "
68 TColorImage::ConstPointer input_image = input_image_reader->GetOutput( );
69 TVTKImage::Pointer vtk_input_image = TVTKImage::New( );
70 vtk_input_image->SetInput( input_image );
71 vtk_input_image->Update( );
74 vtkSmartPointer< vtkImageActor > actor =
75 vtkSmartPointer< vtkImageActor >::New( );
76 actor->SetInputData( vtk_input_image->GetOutput( ) );
78 vtkSmartPointer< vtkRenderer > renderer =
79 vtkSmartPointer< vtkRenderer >::New( );
80 renderer->SetBackground( 0.1, 0.2, 0.7 );
81 renderer->AddActor( actor );
82 vtkSmartPointer< vtkRenderWindow > window =
83 vtkSmartPointer< vtkRenderWindow >::New( );
84 window->SetSize( 800, 800 );
85 window->AddRenderer( renderer );
87 // Correct camera due to the loaded image
88 vtkCamera* camera = renderer->GetActiveCamera( );
89 camera->SetViewUp( 0, -1, 0 );
90 camera->SetPosition( 0, 0, -1 );
91 camera->SetFocalPoint( 0, 0, 0 );
94 vtkSmartPointer< vtkInteractorStyleImage > imageStyle =
95 vtkSmartPointer< vtkInteractorStyleImage >::New( );
96 vtkSmartPointer< vtkRenderWindowInteractor > interactor =
97 vtkSmartPointer< vtkRenderWindowInteractor >::New( );
98 interactor->SetInteractorStyle( imageStyle );
99 window->SetInteractor( interactor );
101 // Create the widget and its representation
102 vtkSmartPointer< vtkPointHandleRepresentation3D > handle =
103 vtkSmartPointer< vtkPointHandleRepresentation3D >::New( );
104 handle->GetProperty( )->SetColor( 1, 0, 0 );
105 vtkSmartPointer< vtkSeedRepresentation > rep =
106 vtkSmartPointer< vtkSeedRepresentation >::New( );
107 rep->SetHandleRepresentation( handle );
109 vtkSmartPointer< vtkSeedWidget > widget =
110 vtkSmartPointer< vtkSeedWidget >::New( );
111 widget->SetInteractor( interactor );
112 widget->SetRepresentation( rep );
114 // Let some interaction
115 interactor->Initialize( );
116 renderer->ResetCamera( );
119 interactor->Start( );
121 // Prepare region grow function
122 typedef fpa::Base::Functors::TautologyFunction< TColorImage::PixelType > TFunction;
123 TFunction::Pointer function = TFunction::New( );
125 // Prepare region grow filter
126 typedef fpa::Image::RegionGrow< TColorImage, TImage > TFilter;
127 TFilter::Pointer filter = TFilter::New( );
128 filter->SetInput( input_image );
129 filter->SetMembershipFunction( function );
130 filter->SetNeighborhoodOrder( neighborhood_order );
131 filter->SetOutsideValue( TPixel( 0 ) );
132 filter->SetInsideValue( std::numeric_limits< TPixel >::max( ) );
133 filter->SetStopAtOneFront( stop_at_one_front );
135 // Get user-given seeds
136 for( unsigned int s = 0; s < rep->GetNumberOfSeeds( ); s++ )
139 rep->GetSeedWorldPosition( s, pos );
141 TImage::PointType pnt;
142 pnt[ 0 ] = TImage::PointType::ValueType( pos[ 0 ] );
143 pnt[ 1 ] = TImage::PointType::ValueType( pos[ 1 ] );
145 TImage::IndexType idx;
146 if( input_image->TransformPhysicalPointToIndex( pnt, idx ) )
147 filter->AddSeed( idx, 0 );
151 // Prepare graphical debugger
152 typedef fpa::VTK::Image2DObserver< TFilter, vtkRenderWindow > TDebugger;
153 TDebugger::Pointer debugger = TDebugger::New( );
154 debugger->SetRenderWindow( window );
155 debugger->SetRenderPercentage( 0.001 );
156 filter->AddObserver( itk::AnyEvent( ), debugger );
157 filter->ThrowEventsOn( );