VTK系列30_提取BMP图像的感兴趣区域(区域提取)
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实例30:提取BMP图像的感兴趣区域(区域提取)
#include "vtkAutoInit.h"
VTK_MODULE_INIT(vtkRenderingOpenGL2);
VTK_MODULE_INIT(vtkInteractionStyle);
#include <vtkSmartPointer.h>
#include <vtkImageData.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkInteractorStyleImage.h>
#include <vtkRenderer.h>
#include <vtkImageActor.h>
#include <vtkBMPReader.h>
#include <vtkExtractVOI.h>
//测试图像:../data/lena.bmp
int main(int argc, char* argv[])
{
vtkSmartPointer<vtkBMPReader> reader =
vtkSmartPointer<vtkBMPReader>::New();
reader->SetFileName ("lena.bmp");
reader->Update();
int dims[3];
reader->GetOutput()->GetDimensions(dims);
vtkSmartPointer<vtkExtractVOI> extractVOI =
vtkSmartPointer<vtkExtractVOI>::New();
extractVOI->SetInputConnection(reader->GetOutputPort());
extractVOI->SetVOI(dims[0]/4.,3.*dims[0]/4.,dims[1]/4.,3.*dims[1]/4., 0, 0);
extractVOI->Update();
vtkSmartPointer<vtkImageActor> originalActor =
vtkSmartPointer<vtkImageActor>::New();
originalActor->SetInputData(reader->GetOutput());
vtkSmartPointer<vtkImageActor> voiActor =
vtkSmartPointer<vtkImageActor>::New();
voiActor->SetInputData(extractVOI->GetOutput());
double originalViewport[4] = {0.0, 0.0, 0.5, 1.0};
double voiviewport[4] = {0.5, 0.0, 1.0, 1.0};
vtkSmartPointer<vtkRenderer> originalRenderer =
vtkSmartPointer<vtkRenderer>::New();
originalRenderer->SetViewport(originalViewport);
originalRenderer->AddActor(originalActor);
originalRenderer->ResetCamera();
originalRenderer->SetBackground(1.0, 1.0, 1.0);
vtkSmartPointer<vtkRenderer> shiftscaleRenderer =
vtkSmartPointer<vtkRenderer>::New();
shiftscaleRenderer->SetViewport(voiviewport);
shiftscaleRenderer->AddActor(voiActor);
shiftscaleRenderer->ResetCamera();
shiftscaleRenderer->SetBackground(1.0, 1.0, 1.0);
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->AddRenderer(originalRenderer);
renderWindow->AddRenderer(shiftscaleRenderer);
renderWindow->SetSize(900, 300);
renderWindow->Render();
renderWindow->SetWindowName("ExtractVOIExample");
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
vtkSmartPointer<vtkInteractorStyleImage> style =
vtkSmartPointer<vtkInteractorStyleImage>::New();
renderWindowInteractor->SetInteractorStyle(style);
renderWindowInteractor->SetRenderWindow(renderWindow);
renderWindowInteractor->Initialize();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
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