1 #include "vtkAutoInit.h"
2 VTK_MODULE_INIT(vtkRenderingOpenGL2);
3 VTK_MODULE_INIT(vtkInteractionStyle);
4
5 #include <vtkSmartPointer.h>
6 #include <vtkImageData.h>
7 #include <vtkImageIdealLowPass.h>
8 #include <vtkImageActor.h>
9 #include <vtkRenderWindow.h>
10 #include <vtkRenderWindowInteractor.h>
11 #include <vtkRenderer.h>
12 #include <vtkJPEGReader.h>
13 #include <vtkImageFFT.h>
14 #include <vtkImageRFFT.h>
15 #include <vtkImageExtractComponents.h>
16 #include <vtkImageCast.h>
17
18 //测试图像：../data/lena-gray.jpg
19 int main(int argc, char* argv[])
20 {
21 vtkSmartPointer<vtkJPEGReader> reader =
22 vtkSmartPointer<vtkJPEGReader>::New();
23 reader->SetFileName("lena-gray.jpg");
24 reader->Update();
25
26 vtkSmartPointer<vtkImageFFT> fftFilter =
27 vtkSmartPointer<vtkImageFFT>::New();
28 fftFilter->SetInputConnection(reader->GetOutputPort());
29 fftFilter->Update();
30
31 vtkSmartPointer<vtkImageIdealLowPass> lowPassFilter =
32 vtkSmartPointer<vtkImageIdealLowPass>::New();
33 lowPassFilter->SetInputConnection(fftFilter->GetOutputPort());
34 lowPassFilter->SetXCutOff(0.05);
35 lowPassFilter->SetYCutOff(0.05);
36 lowPassFilter->Update();
37
38 vtkSmartPointer<vtkImageRFFT> rfftFilter =
39 vtkSmartPointer<vtkImageRFFT>::New();
40 rfftFilter->SetInputConnection(lowPassFilter->GetOutputPort());
41 rfftFilter->Update();
42
43 vtkSmartPointer<vtkImageExtractComponents> ifftExtractReal =
44 vtkSmartPointer<vtkImageExtractComponents>::New();
45 ifftExtractReal->SetInputConnection(rfftFilter->GetOutputPort());
46 ifftExtractReal->SetComponents(0);
47
48 vtkSmartPointer<vtkImageCast> castFilter =
49 vtkSmartPointer<vtkImageCast>::New();
50 castFilter->SetInputConnection(ifftExtractReal->GetOutputPort());
51 castFilter->SetOutputScalarTypeToUnsignedChar();
52 castFilter->Update();
53
54 vtkSmartPointer<vtkImageActor> originalActor =
55 vtkSmartPointer<vtkImageActor>::New();
56 originalActor->SetInputData(reader->GetOutput());
57
58 vtkSmartPointer<vtkImageActor> erodedActor =
59 vtkSmartPointer<vtkImageActor>::New();
60 erodedActor->SetInputData(castFilter->GetOutput());
61
62 double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
63 double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};
64
65 vtkSmartPointer<vtkRenderWindow> renderWindow =
66 vtkSmartPointer<vtkRenderWindow>::New();
67 renderWindow->SetSize(640, 320);
68 renderWindow->Render();
69 renderWindow->SetWindowName("IdealLowPassExample");
70
71 vtkSmartPointer<vtkRenderWindowInteractor> interactor =
72 vtkSmartPointer<vtkRenderWindowInteractor>::New();
73 interactor->SetRenderWindow(renderWindow);
74
75 vtkSmartPointer<vtkRenderer> leftRenderer =
76 vtkSmartPointer<vtkRenderer>::New();
77 renderWindow->AddRenderer(leftRenderer);
78 leftRenderer->SetViewport(leftViewport);
79 leftRenderer->SetBackground(1.0, 1.0, 1.0);
80
81 vtkSmartPointer<vtkRenderer> rightRenderer =
82 vtkSmartPointer<vtkRenderer>::New();
83 renderWindow->AddRenderer(rightRenderer);
84 rightRenderer->SetViewport(rightViewport);
85 rightRenderer->SetBackground(1.0, 1.0, 1.0);
86
87 leftRenderer->AddActor(originalActor);
88 rightRenderer->AddActor(erodedActor);
89
90 leftRenderer->ResetCamera();
91 rightRenderer->ResetCamera();
92
93 renderWindow->Render();
94 interactor->Start();
95
96 return EXIT_SUCCESS;
97 }
