《itk实用demo》-RGB转Luminance

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此程序将彩色图像转换为亮度图像，并将其保存为BMP格式。

彩色图像转亮度图像，并写成文件。

#include "itkImage.h"
#include "itkImageFileReader.h"
#include "itkConnectedComponentImageFilter.h"
#include "itkLabelToRGBImageFilter.h"

#include "itksys/SystemTools.hxx"
#include <sstream>

#include "itkImageToVTKImageFilter.h"
#include "vtkImageViewer.h"
#include "vtkWin32RenderWindowInteractor.h"

#include "itkImageFileWriter.h"
#include <iostream>
#include <string>

#include "itkRGBToLuminanceImageFilter.h"
using namespace std;
int main( int argc, char *argv[])
{
 const unsigned int Dimension = 2;
 typedef unsigned char                       PixelType;
 typedef itk::RGBPixel<unsigned char>         RGBPixelType;
 typedef itk::Image<PixelType, Dimension>     ImageType;
 typedef itk::Image<RGBPixelType, Dimension>  RGBImageType;
 std::string bmp = ".bmp";
 RGBImageType::Pointer image;
 typedef itk::ImageFileReader<RGBImageType> ReaderType;

 for (int num= 0;num<214;num++)
 {
  std::string  inputFilename = "D:\\se6\\rgb\\IM";
  std::string  outputFilename = "D:\\se6\\bmp2\\IM";

  char t[256];
  string s;
  sprintf(t, "%d", num);
  s = t;
  inputFilename = inputFilename + s + bmp;
  outputFilename = outputFilename + s + bmp;

  ReaderType::Pointer reader = ReaderType::New();
  reader->SetFileName(inputFilename);
  reader->Update();

  image = reader->GetOutput();

  typedef itk::Image<unsigned char, 2>  ScalarImageType;
  typedef itk::RGBToLuminanceImageFilter<RGBImageType, ScalarImageType> LuminanceFilterType;
  LuminanceFilterType::Pointer luminanceFilter = LuminanceFilterType::New();
  luminanceFilter->SetInput(image);
  luminanceFilter->Update();

  typedef  itk::ImageFileWriter< ScalarImageType  > WriterType;
  WriterType::Pointer writer = WriterType::New();
  writer->SetFileName(outputFilename);
  writer->SetInput(luminanceFilter->GetOutput());
  writer->Update();
 }


 return EXIT_SUCCESS;
}