images/exampleRigidtransformation3d.cpp

Example of 3D rigid transformation using forward and backward model.

See also

Geometric transformations

Result for backward model

#include <iostream>
#include <cmath>
#include "DGtal/images/ImageSelector.h"
#include "DGtal/images/ImageContainerBySTLVector.h"
#include "DGtal/images/ConstImageAdapter.h"
#include "ConfigExamples.h"
#include "DGtal/helpers/StdDefs.h"
#include "DGtal/base/Common.h"
#include "DGtal/io/readers/VolReader.h"
#include "DGtal/io/writers/GenericWriter.h"
#include "DGtal/kernel/BasicPointFunctors.h"
#include "DGtal/images/RigidTransformation3D.h"

using namespace std;
using namespace DGtal;
using namespace functors;
using namespace Z3i;


int main( int , char** )
{
  typedef ImageSelector<Domain, unsigned char >::Type Image;
  typedef ForwardRigidTransformation3D < Space > ForwardTrans;
  typedef BackwardRigidTransformation3D < Space > BackwardTrans;
  typedef ConstImageAdapter<Image, Domain, BackwardTrans, Image::Value, Identity > MyImageBackwardAdapter;
  typedef DomainRigidTransformation3D < Domain, ForwardTrans > MyTransformedDomain;
  typedef MyTransformedDomain::Bounds Bounds;
  trace.beginBlock ( "Example rigidtransformation3d" );
    ForwardTrans forwardTrans( Point ( 5, 5, 5 ), RealVector ( 1, 0, 1 ), M_PI_4, RealVector( 3, -3, 3 ) );
    BackwardTrans backwardTrans( Point ( 5, 5, 5 ), RealVector ( 1, 0, 1 ), M_PI_4, RealVector( 3, -3, 3 ) );
    MyTransformedDomain domainForwardTrans ( forwardTrans );
    Identity idD;
    
    Image image = VolReader<Image>::importVol ( examplesPath + "samples/cat10.vol" );
    Bounds bounds = domainForwardTrans ( image.domain() );
    Domain transformedDomain ( bounds.first, bounds.second );
    trace.beginBlock ( "Backward - Eulerian model" );
      MyImageBackwardAdapter adapter ( image, transformedDomain, backwardTrans, idD );
      adapter >> "backward_transform.pgm3d";
    trace.endBlock();
  
    trace.beginBlock( "Forward - Lagrangian model" );
      Image transformed ( transformedDomain );
      for ( Domain::ConstIterator it = image.domain().begin(); it != image.domain().end(); ++it )
      {
        transformed.setValue ( forwardTrans ( *it ), image ( *it ) );
      }
      transformed >> "forward_transform.pgm3d";
    trace.endBlock();
  trace.endBlock();
  return 0;
}
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