VTK 实例43：各向异性滤波（图像光滑）

 1 #include "vtkAutoInit.h" 
 2 VTK_MODULE_INIT(vtkRenderingOpenGL2);
 3 VTK_MODULE_INIT(vtkInteractionStyle);
 4 
 5 #include <vtkSmartPointer.h>
 6 #include <vtkCamera.h>
 7 #include <vtkImageActor.h>
 8 #include <vtkImageAnisotropicDiffusion2D.h>
 9 #include <vtkImageAnisotropicDiffusion3D.h>
10 #include <vtkImageCast.h>
11 #include <vtkImageData.h>
12 #include <vtkImageMandelbrotSource.h>
13 #include <vtkInteractorStyleImage.h>
14 #include <vtkJPEGReader.h>
15 #include <vtkRenderWindow.h>
16 #include <vtkRenderWindowInteractor.h>
17 #include <vtkRenderer.h>
18 
19 //测试图像：../data/lena-gray.jpg
20 int main(int argc, char* argv[])
21 {
22     vtkSmartPointer<vtkJPEGReader> reader =
23         vtkSmartPointer<vtkJPEGReader>::New();
24     reader->SetFileName("lena-gray.jpg");
25 
26     vtkSmartPointer<vtkImageAnisotropicDiffusion2D> diffusion =
27         vtkSmartPointer<vtkImageAnisotropicDiffusion2D>::New();
28     diffusion->SetInputConnection(reader->GetOutputPort());
29     diffusion->SetNumberOfIterations(10);
30     diffusion->SetDiffusionThreshold(20);
31     diffusion->Update();
32 
33     vtkSmartPointer<vtkImageActor> originalActor =
34         vtkSmartPointer<vtkImageActor>::New();
35     originalActor->SetInputData(reader->GetOutput());
36 
37     vtkSmartPointer<vtkImageActor> diffusionActor =
38         vtkSmartPointer<vtkImageActor>::New();
39     diffusionActor->SetInputData(diffusion->GetOutput());
40 
41     double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
42     double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};
43 
44     vtkSmartPointer<vtkCamera> camera =
45         vtkSmartPointer<vtkCamera>::New();
46     vtkSmartPointer<vtkRenderer> leftRenderer =
47         vtkSmartPointer<vtkRenderer>::New();
48     leftRenderer->SetViewport(leftViewport);
49     leftRenderer->AddActor(originalActor);
50     leftRenderer->SetBackground(1.0, 1.0, 1.0);
51     leftRenderer->SetActiveCamera(camera);
52     leftRenderer->ResetCamera();
53 
54     vtkSmartPointer<vtkRenderer> rightRenderer =
55         vtkSmartPointer<vtkRenderer>::New();
56     rightRenderer->SetViewport(rightViewport);
57     rightRenderer->SetBackground(1.0, 1.0, 1.0);
58     rightRenderer->AddActor(diffusionActor);
59     rightRenderer->SetActiveCamera(camera);
60 
61     vtkSmartPointer<vtkRenderWindow> renderWindow =
62         vtkSmartPointer<vtkRenderWindow>::New();
63     renderWindow->AddRenderer(leftRenderer);
64     renderWindow->AddRenderer(rightRenderer);
65     renderWindow->SetSize(640, 320);
66     renderWindow->Render();
67     renderWindow->SetWindowName("AnistropicFilteringExample");
68 
69     vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
70         vtkSmartPointer<vtkRenderWindowInteractor>::New();
71     vtkSmartPointer<vtkInteractorStyleImage> style =
72         vtkSmartPointer<vtkInteractorStyleImage>::New();
73 
74     renderWindowInteractor->SetInteractorStyle(style);
75     renderWindowInteractor->SetRenderWindow(renderWindow);
76     renderWindowInteractor->Initialize();
77     renderWindowInteractor->Start();
78 
79     return EXIT_SUCCESS;
80 }