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 <vtkImageCanvasSource2D.h>
8 #include <vtkImageShiftScale.h>
9 #include <vtkRenderWindow.h>
10 #include <vtkRenderWindowInteractor.h>
11 #include <vtkInteractorStyleImage.h>
12 #include <vtkRenderer.h>
13 #include <vtkImageActor.h>
14 #include <vtkJPEGReader.h>
15 #include <vtkImageLaplacian.h>
16
17 //测试图像：../data/lena-gray.jpg
18 int main(int argc, char* argv[])
19 {
20 vtkSmartPointer<vtkJPEGReader> reader =
21 vtkSmartPointer<vtkJPEGReader>::New();
22 reader->SetFileName("lena-gray.jpg");
23 reader->Update();
24
25 vtkSmartPointer<vtkImageLaplacian> lapFilter =
26 vtkSmartPointer<vtkImageLaplacian>::New();
27 lapFilter->SetInputConnection(reader->GetOutputPort());
28 lapFilter->SetDimensionality(2);
29
30 double range[2];
31 lapFilter->GetOutput()->GetScalarRange(range);
32
33 vtkSmartPointer<vtkImageShiftScale> ShiftScale =
34 vtkSmartPointer<vtkImageShiftScale>::New();
35 ShiftScale->SetOutputScalarTypeToUnsignedChar();
36 ShiftScale->SetScale( 255 / (range[1]-range[0]) );
37 ShiftScale->SetShift(-range[0]);
38 ShiftScale->SetInputConnection(lapFilter->GetOutputPort());
39 ShiftScale->Update();
40
41 vtkSmartPointer<vtkImageActor> originalActor =
42 vtkSmartPointer<vtkImageActor>::New();
43 originalActor->SetInputData(reader->GetOutput());
44
45 vtkSmartPointer<vtkImageActor> gradActor =
46 vtkSmartPointer<vtkImageActor>::New();
47 gradActor->SetInputData(ShiftScale->GetOutput());
48
49 double originalViewport[4] = {0.0, 0.0, 0.5, 1.0};
50 double gradviewport[4] = {0.5, 0.0, 1.0, 1.0};
51
52 vtkSmartPointer<vtkRenderer> originalRenderer =
53 vtkSmartPointer<vtkRenderer>::New();
54 originalRenderer->SetViewport(originalViewport);
55 originalRenderer->AddActor(originalActor);
56 originalRenderer->ResetCamera();
57 originalRenderer->SetBackground(1.0, 1.0, 1.0);
58
59 vtkSmartPointer<vtkRenderer> gradRenderer =
60 vtkSmartPointer<vtkRenderer>::New();
61 gradRenderer->SetViewport(gradviewport);
62 gradRenderer->AddActor(gradActor);
63 gradRenderer->ResetCamera();
64 gradRenderer->SetBackground(1.0, 1.0, 1.0);
65
66 vtkSmartPointer<vtkRenderWindow> renderWindow =
67 vtkSmartPointer<vtkRenderWindow>::New();
68 renderWindow->AddRenderer(originalRenderer);
69 renderWindow->AddRenderer(gradRenderer);
70 renderWindow->SetSize(640, 320);
71 renderWindow->Render();
72 renderWindow->SetWindowName("LaplacianExample");
73
74 vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
75 vtkSmartPointer<vtkRenderWindowInteractor>::New();
76 vtkSmartPointer<vtkInteractorStyleImage> style =
77 vtkSmartPointer<vtkInteractorStyleImage>::New();
78
79 renderWindowInteractor->SetInteractorStyle(style);
80 renderWindowInteractor->SetRenderWindow(renderWindow);
81 renderWindowInteractor->Initialize();
82 renderWindowInteractor->Start();
83
84 return EXIT_SUCCESS;
85 }
