《itk实用demo》-亮度投射 放大灰度区间

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亮度投射 放大灰度区间

//亮度投射  放大灰度区间
 typedef itk::RescaleIntensityImageFilter<ImageType, ImageType> RescaleIntensityImageFilter_ext_3d;
 RescaleIntensityImageFilter_ext_3d::Pointer rescaleFliter_ext_3d
  = RescaleIntensityImageFilter_ext_3d::New();
 rescaleFliter_ext_3d->SetInput(heartLogic3->GetOutput());
 rescaleFliter_ext_3d->SetOutputMinimum(0);
 rescaleFliter_ext_3d->SetOutputMaximum(1);

 typedef itk::SigmoidImageFilter <ImageType, ImageType> SigmoidImageFilterType;
 SigmoidImageFilterType::Pointer sigmoidFilter = SigmoidImageFilterType::New();
 sigmoidFilter->SetInput(imagedata);
 sigmoidFilter->SetOutputMinimum(-1024);
 sigmoidFilter->SetOutputMaximum(800);
 sigmoidFilter->SetAlpha(100.0);
 sigmoidFilter->SetBeta(150.0);

 //亮度投射
 typedef itk::RescaleIntensityImageFilter<ImageType, ImageType> RescaleIntensityImageFilter_ext_3d;
 RescaleIntensityImageFilter_ext_3d::Pointer rescaleFliter_ext_3d
  = RescaleIntensityImageFilter_ext_3d::New();
 rescaleFliter_ext_3d->SetInput(regionFliter->GetOutput());
 rescaleFliter_ext_3d->SetOutputMinimum(-32768);
 rescaleFliter_ext_3d->SetOutputMaximum(32767);

//占内存长度不同和取值范围不同
int 32位 -2^32---2^32-1
short 16位 -32768～32767 
32位系统：long是4字节32位，int是4字节32位
64位系统：long是8字节64位，int是4字节32位

//获得灰度区间
 //cout<<"获得灰度区间"<<endl;
 typedef itk::StatisticsImageFilter<ImageType> StatisticsImageFilterType;
 StatisticsImageFilterType::Pointer statisticsImageFilter = StatisticsImageFilterType::New ();
 statisticsImageFilter->SetInput(shrinkFilter->GetOutput());
 statisticsImageFilter->Update();
 signed int pRange[2]; //这里会有负值
 pRange[0] = statisticsImageFilter->GetMinimum();
 pRange[1] = statisticsImageFilter->GetMaximum();