注：SetCenterImage函数作用是将（0，0，0）点置于图像的中心，所以本程序执行该函数时会从新调用SetOutputOrigin（），所以会覆盖上方设置的原点位置，如果想让本程序输出设定的原点位置为（100，100，0），只需屏蔽语句SetCenterImage（1）
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VTK
1 #include "vtkAutoInit.h"
2 VTK_MODULE_INIT(vtkRenderingOpenGL2);
3 VTK_MODULE_INIT(vtkInteractionStyle);
4
5 #include <vtkSmartPointer.h>
6 #include <vtkImageViewer2.h>
7 #include <vtkRenderWindoh>
8 #include <vtkRenderWindowInteractor.h>
9 #include <vtkRenderer.h>
10 #include <vtkBMPReader.h>
11 #include <vtkImageChangeInformation.h>
12 #include <vtkImageData.h>
13
14 //测试图像：../data/lena.bmp
15 int main(int argc, char* argv[])
16 */
22
23 vtkSmartPointer<vtkBMPReader> reader =
24 vtkSmartPointer<vtkBMPReader>::New();
25 //reader>SetFileName(argv[1]);
26 reader>SetFileName("lena.bmp");
27 reader>Update();
28
29 int dims[3];
30 double origin[3];
31 double spaceing[3];
32
33 reader>GetOutput()>GetDimensions(dims);
34 std::cout<<"原图像维数:" <<dims[0]<<" "<<dims[1]<<" "<<dims[2]<<std::endl;
35 reader>GetOutput()>GetOrigin(origin);
36 std::cout<<"原图像原点:" <<origin[0]<<" "<<origin[1]<<" "<<origin[2]<<std::endl;
37 reader>GetOutput()>GetSpacing(spaceing);
38 std::cout<<"原像素间隔:" <<spaceing[0]<<" "<<spaceing[1]<<" "<<spaceing[2]<<std::endl<<std::endl;;
39
40 vtkSmartPointer<vtkImageChangeInformation> changer =
41 vtkSmartPointer<vtkImageChangeInformation>::New();
42 changer>SetInputData(reader>GetOutput());//
43 changer>SetOutputOrigin(100, 100, 0);
44 changer>SetOutputSpacing(5,5,1);
45 changer>SetCenterImage(1);
46 changer>Update();
47
48 changer>GetOutput()>GetDimensions(dims);
49 std::cout<<"修改后图像维数:" <<dims[0]<<" "<<dims[1]<<" "<<dims[2]<<std::endl;
50 changer>GetOutput()>GetOrigin(origin);
51 std::cout<<"修改后图像原点:" <<origin[0]<<" "<<origin[1]<<" "<<origin[2]<<std::endl;
52 changer>GetOutput()>GetSpacing(spaceing);
53 std::cout<<"修改后像素间隔:" <<spaceing[0]<<" "<<spaceing[1]<<" "<<spaceing[2]<<std::endl;
54
55 vtkSmartPointer<vtkImageViewer2> imageViewer =
56 vtkSmartPointer<vtkImageViewer2>::New();
57 imageViewer>SetInputConnection(changer>GetOutputPort());
58 vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
59 vtkSmartPointer<vtkRenderWindowInteractor>::New();
60 imageViewer>SetupInteractor(renderWindowInteractor);
61 imageViewer>Render();
62 imageViewer>GetRenderer()>ResetCamera();
imageViewer>Render();
64
65 imageViewer>GetRenderer()>SetBackground(1.0, 1.0, 1.0);
66 imageViewer>SetSize(640, 480);
67 imageViewer>GetRenderWindow()>SetWindowName("ImageChangeInformationExample");
68
69
70 renderWindowInteractor>Start();
71
72 return EXIT_SUCCESS;
73 }
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VTK
