VTK 读取JPEG图像 灰度化 彩色映射

VTK6.1.0  闲来无事，敲段小代码

#include "stdafx.h"#include <vtkAutoInit.h>       VTK_MODULE_INIT(vtkRenderingOpenGL);VTK_MODULE_INIT(vtkInteractionStyle);VTK_MODULE_INIT(vtkRenderingFreeType);#include <vtkRenderer.h>#include <vtkJPEGReader.h>#include <vtkLookupTable.h>#include <vtkSmartPointer.h>#include <vtkImageViewer2.h>#include <vtkRenderWindow.h>#include <vtkImageLuminance.h>#include <vtkImageMapToColors.h>#include <vtkRenderWindowInteractor.h>int _tmain(int argc, _TCHAR* argv[]){vtkSmartPointer<vtkJPEGReader> jpegReader = vtkSmartPointer<vtkJPEGReader>::New();jpegReader->SetFileName("E:\\workspace\\001.jpg");// 将彩色图转换为灰度图vtkSmartPointer<vtkImageLuminance> lumFilter = vtkSmartPointer<vtkImageLuminance>::New();lumFilter->SetInputConnection(jpegReader->GetOutputPort());lumFilter->Update(); // 图像彩色映射vtkSmartPointer<vtkLookupTable> colorTable = vtkSmartPointer<vtkLookupTable>::New();colorTable->SetRange(.0, 255.0);// 设置要映射的标量数据的范围colorTable->SetHueRange(.3, .7); // 设置HSV颜色空间的hue值范围, 最大范围为[0, 1]colorTable->SetValueRange(.5, 1.0); // 设置HSV中Value值的范围,最大范围为[0, 1]colorTable->Build(); // 生成颜色查找表vtkSmartPointer<vtkImageMapToColors> colorMap = vtkSmartPointer<vtkImageMapToColors>::New();colorMap->SetInputConnection(lumFilter->GetOutputPort());colorMap->SetLookupTable(colorTable);colorMap->Update();vtkSmartPointer<vtkImageViewer2> imgView = vtkSmartPointer<vtkImageViewer2>::New();imgView->SetInputConnection(jpegReader->GetOutputPort());vtkSmartPointer<vtkRenderWindowInteractor> iren = vtkSmartPointer<vtkRenderWindowInteractor>::New();imgView->SetupInteractor(iren);imgView->Render();imgView->GetRenderer()->ResetCamera();imgView->GetRenderWindow()->SetSize(800, 800);imgView->Render();iren->Start();return 0;}

原图：

灰度化：

再映射到彩色中：