io/viewers/viewer3D-8-2DSliceImages.cpp

Illustration of the 2D image slice visualization.

 
#include <iostream>
#include "DGtal/base/Common.h"
#include "DGtal/io/readers/VolReader.h"
#include "DGtal/images/ImageHelper.h"
#include "ConfigExamples.h"
#include "DGtal/io/viewers/Viewer3D.h"
 
#include "DGtal/io/DrawWithDisplay3DModifier.h"
#include "DGtal/io/viewers/DrawWithViewer3DModifier.h"
#include "DGtal/io/colormaps/HueShadeColorMap.h"
#include "DGtal/io/Color.h"
 
 
using namespace std;
using namespace DGtal;
 
struct hueFct{
 inline
 unsigned int operator() (unsigned char aVal) const
  {
    HueShadeColorMap<unsigned char>  hueShade(0,255);
    Color col = hueShade((unsigned char)aVal);
    return  (((unsigned int) col.red()) <<  16)| (((unsigned int) col.green()) << 8)|((unsigned int) col.blue());
  }
};
 
int main( int argc, char** argv )
{
 
  typedef DGtal::ImageContainerBySTLVector<DGtal::Z3i::Domain,  unsigned char > Image3D;
  QApplication application(argc,argv);
  typedef Viewer3D<> MyViewer;
  MyViewer viewer;
  viewer.show();
  std::string inputFilename = examplesPath + "samples/lobster.vol";
  Image3D imageVol = VolReader<Image3D>::importVol(inputFilename);
 
 
  // Extracting the 2D images from the 3D one and from a given dimension.
  // First image  the teenth Z slice (dim=2)
  typedef DGtal::ConstImageAdapter<Image3D, DGtal::Z2i::Domain, DGtal::functors::Projector< DGtal::Z3i::Space>,
           Image3D::Value,  DGtal::functors::Identity >  MySliceImageAdapter;
 
  // Define the functor to recover a 2D domain from the 3D one in the Z direction (2):
  DGtal::functors::Projector<DGtal::Z2i::Space>  transTo2DdomainFunctorZ; transTo2DdomainFunctorZ.initRemoveOneDim(2);
  DGtal::Z2i::Domain domain2DZ(transTo2DdomainFunctorZ(imageVol.domain().lowerBound()),
             transTo2DdomainFunctorZ(imageVol.domain().upperBound()));
 
  // Define the functor to associate 2D coordinates to the 3D one by giving the direction Z (2) and the slide numnber (10):
  DGtal::functors::Projector<DGtal::Z3i::Space> aSliceFunctorZ(10); aSliceFunctorZ.initAddOneDim(2);
 
  // We can now obtain the slice image (a ConstImageAdapter):
  const auto identityFunctor = DGtal::functors::Identity();
  MySliceImageAdapter aSliceImageZ(imageVol, domain2DZ, aSliceFunctorZ, identityFunctor );
 
  // Second image  the fiftieth Y slice (dim=1)
  // Define the functor to recover a 2D domain from the 3D one in the Y direction (1):
  DGtal::functors::Projector<DGtal::Z2i::Space>  transTo2DdomainFunctorY; transTo2DdomainFunctorY.initRemoveOneDim(1);
  DGtal::Z2i::Domain domain2DY(transTo2DdomainFunctorY(imageVol.domain().lowerBound()),
             transTo2DdomainFunctorY(imageVol.domain().upperBound()));
 
  // Define the functor to associate 2D coordinates to the 3D one by giving the direction Y (1) and the slide numnber (50):
  DGtal::functors::Projector<DGtal::Z3i::Space> aSliceFunctorY(50); aSliceFunctorY.initAddOneDim(1);
 
  // We can now obtain the slice image (a ConstImageAdapter):
  MySliceImageAdapter aSliceImageY(imageVol, domain2DY, aSliceFunctorY, identityFunctor );
 
  viewer << SetMode3D(aSliceImageZ.className(), "BoundingBox");
  viewer << MyViewer::updateDisplay;
 
  viewer <<  aSliceImageZ;
  viewer <<  aSliceImageY;
 
  viewer << SetMode3D(aSliceImageZ.className(), "");
  viewer << AddTextureImage2DWithFunctor<MySliceImageAdapter, hueFct, Z3i::Space, Z3i::KSpace> (aSliceImageZ, hueFct(), Viewer3D<Z3i::Space, Z3i::KSpace>::RGBMode);
  viewer << AddTextureImage2DWithFunctor<MySliceImageAdapter, hueFct, Z3i::Space, Z3i::KSpace> (aSliceImageY, hueFct(), Viewer3D<Z3i::Space, Z3i::KSpace>::RGBMode);
 
 
  viewer << DGtal::UpdateImagePosition<Z3i::Space, Z3i::KSpace>(1, MyViewer::yDirection, 0.0,  50.0, 0.0);
  viewer << DGtal::UpdateImageData<MySliceImageAdapter>(0, aSliceImageZ,  0, 0, 10);
  viewer << MyViewer::updateDisplay;
 
 
  viewer << DGtal::UpdateImagePosition<Z3i::Space, Z3i::KSpace>(3, MyViewer::yDirection, 500.0,  50.0, 0.0);
  viewer << DGtal::UpdateImageData<MySliceImageAdapter, hueFct>(2, aSliceImageZ, 500, 0, 10, 0.0, MyViewer::zDirection, hueFct());
  viewer << MyViewer::updateDisplay;
 
return application.exec();
 
}
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