实现图像的缩放

#include "vtkBMPReader.h" 
#include "vtkImageViewer.h" 
#include "vtkRenderWindowInteractor.h" 

#include "vtkImageMagnify.h" 
#include "vtkTransform.h" 

  
int main() 
{ 
    vtkBMPReader  *reader=  vtkBMPReader::New(); 
    reader->SetDataByteOrderToLittleEndian(); 
    reader->SetFileName("mm.bmp"); //程序当前目录中有这个文件
    reader->SetDataOrigin(0,0,0.0); 
    vtkTransform *t1=vtkTransform::New();  
    t1->RotateZ(0); 
    reader->SetTransform(t1); //控制图像的旋转

    vtkImageMagnify *scale=vtkImageMagnify::New(); 
      scale->SetInputConnection(reader->GetOutputPort()); 
      scale->SetMagnificationFactors(2,2,2); //图像各个维度的维放

    vtkImageViewer  *viewer = vtkImageViewer::New(); 
    viewer->SetInput(scale->GetOutput()); 
    viewer->SetColorWindow(1000); 
    viewer->SetColorLevel(200); 
    viewer->SetPosition(0,0); 
    viewer->Render(); 

    vtkRenderWindowInteractor *viewerinter = vtkRenderWindowInteractor::New(); 
    viewer->SetupInteractor(viewerinter); 

    vtkImageViewer  *viewer2 = vtkImageViewer::New(); //没有缩放的原图，以作对比
    viewer2->SetInput(reader->GetOutput()); 
    viewer2->SetColorWindow(256); 
    viewer2->SetColorLevel(200); 
    viewer2->SetPosition(0,100); 
    viewer2->Render(); 

    vtkRenderWindowInteractor *viewerinter2 = vtkRenderWindowInteractor::New(); 
    viewer2->SetupInteractor(viewerinter2); 
    viewerinter->Initialize(); 
    viewerinter->Start();  
   
    scale->Delete(); 
    viewer->Delete(); 
    viewerinter->Delete(); 
    viewer2->Delete(); 
    viewerinter2->Delete(); 

    return 0; 
} 

保存以上代码为文件：ImageScale.cxx

以下是CMakeLists.txt
cmake_minimum_required(VERSION 2.6)
PROJECT (ImageScale)

IF(NOT VTK_BINARY_DIR)
FIND_PACKAGE(VTK REQUIRED)
IF(NOT VTK_USE_RENDERING)
  MESSAGE(FATAL_ERROR "${PROJECT_NAME} requires VTK_USE_RENDERING.")
ENDIF(NOT VTK_USE_RENDERING)
INCLUDE(${VTK_USE_FILE})
ENDIF(NOT VTK_BINARY_DIR)

ADD_EXECUTABLE(ImageScale ImageScale.cxx)
TARGET_LINK_LIBRARIES(ImageScale vtkRendering vtkIO)
附程序原图：
 
贴个图（好漂漂的mm ）：

 

 

本文来源：http://www.vislab.cn/bbs/viewthread.php?tid=3075&extra=page%3D17