VTK 实例24：BMP图像信息的修改（图像维数、原点坐标和像素间隔）

 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 <vtkRenderWindow.h>
 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 {
17     /*if (argc < 2)
18     {
19         std::cout<<argv[0]<<" "<<"ImageFile(*.bmp)"<<std::endl;
20         return EXIT_FAILURE;
21     }*/
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();
63     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 }