VTK 实例38：Sobel梯度算子（边缘检测）

1 #include "vtkAutoInit.h" 2 VTK_MODULE_INIT(vtkRenderingOpenGL2); 3 VTK_MODULE_INIT(vtkInteractionStyle); 4 5 #include <vtkSmartPointer.h> 6 #include <vtkImageMathematics.h> 7 #include <vtkImageData.h> 8 #include <vtkImageSobel2D.h> 9 #include <vtkImageMagnitude.h> 10 #include <vtkImageExtractCponents.h> 11 #include <vtkImageShiftScale.h> 12 #include <vtkRenderWindoh> 13 #include <vtkRenderWindowInteractor.h> 14 #include <vtkInteractorStyleImage.h> 15 #include <vtkRenderer.h> 16 #include <vtkImageActor.h> 17 #include <vtkJPEGReader.h> 18 19 //测试图像：../data/lenagray.jpg 20 int main(int argc, char* argv[]) 21 ; 88 double xViewport[4] = ; 89 double yViewport[4] = ; 90 91 vtkSmartPointer<vtkRenderer> originalRenderer = 92 vtkSmartPointer<vtkRenderer>::New(); 93 originalRenderer>SetViewport(originalViewport); 94 originalRenderer>AddActor(originalActor); 95 originalRenderer>ResetCamera(); 96 originalRenderer>SetBackground(1.0, 1.0, 1.0); 97 98 vtkSmartPointer<vtkRenderer> xRenderer = 99 vtkSmartPointer<vtkRenderer>::New(); 100 xRenderer>SetViewport(xViewport); 101 xRenderer>AddActor(xActor); 102 xRenderer>ResetCamera(); 103 xRenderer>SetBackground(1.0, 1.0, 1.0); 104 105 vtkSmartPointer<vtkRenderer> yRenderer = 106 vtkSmartPointer<vtkRenderer>::New(); 107 yRenderer>SetViewport(yViewport); 108 yRenderer>AddActor(yActor); 109 yRenderer>ResetCamera(); 110 yRenderer>SetBackground(1.0, 1.0, 1.0); 111 112 vtkSmartPointer<vtkRenderWindow> renderWindow = 113 vtkSmartPointer<vtkRenderWindow>::New(); 114 renderWindow>SetSize(1200, 300); 115 renderWindow>AddRenderer(originalRenderer); 116 renderWindow>AddRenderer(xRenderer); 117 renderWindow>AddRenderer(yRenderer); 118 renderWindow>Render(); 119 renderWindow>SetWindowName("SobelExample"); 120 121 vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 122 vtkSmartPointer<vtkRenderWindowInteractor>::New(); 123 vtkSmartPointer<vtkInteractorStyleImage> style = 124 vtkSmartPointer<vtkInteractorStyleImage>::New(); 125 126 renderWindowInteractor>SetInteractorStyle(style); 127 renderWindowInteractor>SetRenderWindow(renderWindow); 128 renderWindowInteractor>Initialize(); 129 renderWindowInteractor>Start(); 130 131 return EXIT_SUCCESS; 132 }

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