testEstimatorComparator.cpp File Reference

#include <iostream>
#include "DGtal/base/Common.h"
#include "DGtal/shapes/Shapes.h"
#include "DGtal/shapes/ShapeFactory.h"
#include "DGtal/geometry/curves/estimation/TrueLocalEstimatorOnPoints.h"
#include "DGtal/geometry/curves/estimation/ParametricShapeCurvatureFunctor.h"
#include "DGtal/geometry/curves/estimation/ParametricShapeTangentFunctor.h"
#include "DGtal/geometry/curves/estimation/ParametricShapeArcLengthFunctor.h"
#include "DGtal/geometry/curves/estimation/MostCenteredMaximalSegmentEstimator.h"
#include "DGtal/geometry/curves/ArithmeticalDSSComputer.h"
#include "DGtal/kernel/SpaceND.h"
#include "DGtal/kernel/domains/HyperRectDomain.h"
#include "DGtal/kernel/sets/DigitalSetSelector.h"
#include "DGtal/topology/KhalimskySpaceND.h"
#include "DGtal/topology/SurfelAdjacency.h"
#include "DGtal/topology/SurfelNeighborhood.h"
#include "DGtal/shapes/GaussDigitizer.h"
#include "DGtal/geometry/curves/GridCurve.h"
#include "DGtal/geometry/curves/estimation/CompareLocalEstimators.h"
#include "ConfigTest.h"

Go to the source code of this file.

Functions
template<typename Shape >
bool	testCompareEstimator (const std::string &name, const Shape &aShape, double h)
int	main (int argc, char **argv)

Detailed Description

This program is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Author

David Coeurjolly (david.nosp@m..coe.nosp@m.urjol.nosp@m.ly@l.nosp@m.iris..nosp@m.cnrs.nosp@m..fr ) Laboratoire d'InfoRmatique en Image et Systèmes d'information - LIRIS (CNRS, UMR 5205), CNRS, France

Jacques-Olivier Lachaud (jacqu.nosp@m.es-o.nosp@m.livie.nosp@m.r.la.nosp@m.chaud.nosp@m.@uni.nosp@m.v-sav.nosp@m.oie..nosp@m.fr ) Laboratory of Mathematics (CNRS, UMR 5807), University of Savoie, France

Date

2011/06/30

Functions for testing class TrueLocalEstimator.

This file is part of the DGtal library.

Definition in file testEstimatorComparator.cpp.

Function Documentation

main()

int main	(	int	argc,
		char **	argv
	)

Definition at line 193 of file testEstimatorComparator.cpp.

{
  trace.beginBlock ( "Testing class CompareLocalEstimator" );
  trace.info() << "Args:";
  for ( int i = 0; i < argc; ++i )
    trace.info() << " " << argv[ i ];
  trace.info() << endl;
 
  typedef Flower2D< Z2i::Space > MyFlower;
  MyFlower flower( 0.5, -2.3, 5.0, 0.7, 6, 0.3 );
  bool res = testCompareEstimator<MyFlower>("Flower", flower, 0.25);
  return res ? 0 : 1;
 
}

References DGtal::Trace::beginBlock(), DGtal::Trace::info(), and DGtal::trace.

testCompareEstimator()

template<typename Shape >

bool testCompareEstimator	(	const std::string &	name,
		const Shape &	aShape,
		double	h
	)

Definition at line 69 of file testEstimatorComparator.cpp.

{
  using namespace Z2i;
 
  trace.beginBlock ( ( "Testing CompareEstimator on digitization of "
           + name ). c_str() );
  
  // Creates a digitizer on the window (xLow, xUp).
  typedef Space::RealPoint RealPoint;
  RealPoint xLow( -10.0, -10.0 );
  RealPoint xUp( 10.0, 10.0 );
  GaussDigitizer<Space,Shape> dig;  
  dig.attach( aShape ); // attaches the shape.
  dig.init( xLow, xUp, h ); 
  
  // The domain size is given by the digitizer according to the window
  // and the step.
  Domain domain = dig.getDomain();
 
  // Create cellular space
  KSpace K;
  bool ok = K.init( dig.getLowerBound(), dig.getUpperBound(), true );
  if ( ! ok )
    {
      std::cerr << "[testCompareEstimators]"
    << " error in creating KSpace." << std::endl;
    }
  else
    try {
      // Extracts shape boundary
      SurfelAdjacency<KSpace::dimension> SAdj( true );
      SCell bel = Surfaces<KSpace>::findABel( K, dig, 10000 );
      // Getting the consecutive surfels of the 2D boundary
      std::vector<Point> points;
      Surfaces<KSpace>::track2DBoundaryPoints( points, K, SAdj, dig, bel );
      // Create GridCurve
      GridCurve<KSpace> gridcurve;
      gridcurve.initFromVector( points );
      typedef GridCurve<KhalimskySpaceND<2> >::PointsRange Range;
      typedef Range::ConstIterator ConstIteratorOnPoints;
      Range r = gridcurve.getPointsRange();//building range
 
      unsigned int nb = 0; 
      unsigned int nbok = 0; 
      //curvature
      typedef ParametricShapeCurvatureFunctor< Shape > Curvature;
      typedef TrueLocalEstimatorOnPoints< ConstIteratorOnPoints, Shape, Curvature  >  TrueCurvature;
      TrueCurvature curvatureEstimator;
      TrueCurvature curvatureEstimatorBis;
      curvatureEstimator.attach( aShape );
      curvatureEstimatorBis.attach( aShape );
 
      typedef CompareLocalEstimators< TrueCurvature, TrueCurvature> Comparator;
 
      trace.info()<< "True curvature comparison at "<< *r.begin() << " = "
                  << Comparator::compare(curvatureEstimator,curvatureEstimatorBis, r.begin(), h)
                  << std::endl;
      
      typename Comparator::OutputStatistic error =
              Comparator::compare(curvatureEstimator, curvatureEstimatorBis,
                            r.begin(), r.end(), h);
      
      trace.info() << "Nb samples= "<< error.samples()<<std::endl;
      trace.info() << "Error mean= "<< error.mean()<<std::endl;
      trace.info() << "Error max= "<< error.max()<<std::endl;
      nbok += ( ( ( (unsigned int)error.samples() ) == r.size())
                && (error.max() == 0) )
        ? 1 : 0; 
      nb++;
      trace.info() << nbok << "/" << nb << std::endl; 
 
      //tangents
      typedef ParametricShapeTangentFunctor< Shape > Tangent;
      typedef TrueLocalEstimatorOnPoints< ConstIteratorOnPoints, Shape, Tangent  >  TrueTangent;
 
      typedef ArithmeticalDSSComputer<ConstIteratorOnPoints,KSpace::Integer,4> 
  SegmentComputer;
      typedef TangentFromDSSEstimator<SegmentComputer> Functor;
      typedef MostCenteredMaximalSegmentEstimator<SegmentComputer,Functor> 
  MSTangentEstimator;
 
      SegmentComputer sc;
      Functor f; 
      
      TrueTangent tang1;
      MSTangentEstimator tang2(sc, f); 
 
      tang1.attach( aShape ); 
      tang2.init( r.begin(), r.end() );
      
      typedef CompareLocalEstimators< TrueTangent, MSTangentEstimator> ComparatorTan;
 
      trace.info()<< "Tangent comparison at "<< *r.begin() << " = " 
                  << ComparatorTan::compareVectors( tang1, tang2, r.begin(), h)
                  << std::endl; 
      
      typename ComparatorTan::OutputVectorStatistic error2
              = ComparatorTan::compareVectors(tang1, tang2, r.begin(), r.end(), h);
      
      trace.info()<< "Nb samples= "<< error2.samples()<<std::endl;
      trace.info()<< "Error mean= "<< error2.mean()<<std::endl;
      trace.info()<< "Error max= "<< error2.max()<<std::endl;
      nbok += (error.samples() == r.size())?1:0; 
      nb++;
      trace.info() << nbok << "/" << nb << std::endl; 
      ok += (nb == nbok); 
 
     }    
    catch ( InputException& e )
      {
  std::cerr << "[testCompareEstimator]"
      << " error in finding a bel." << std::endl;
  ok = false;
      }
  trace.emphase() << ( ok ? "Passed." : "Error." ) << endl;
  trace.endBlock();
  return ok;
  
}

References DGtal::TrueLocalEstimatorOnPoints< TConstIteratorOnPoints, TParametricShape, TParametricShapeFunctor >::attach(), DGtal::GaussDigitizer< TSpace, TEuclideanShape >::attach(), DGtal::Trace::beginBlock(), domain, DGtal::Trace::emphase(), DGtal::Trace::endBlock(), DGtal::Surfaces< TKSpace >::findABel(), DGtal::GaussDigitizer< TSpace, TEuclideanShape >::getDomain(), DGtal::GaussDigitizer< TSpace, TEuclideanShape >::getLowerBound(), DGtal::GridCurve< TKSpace >::getPointsRange(), DGtal::GaussDigitizer< TSpace, TEuclideanShape >::getUpperBound(), DGtal::Trace::info(), DGtal::KhalimskySpaceND< dim, TInteger >::init(), DGtal::GaussDigitizer< TSpace, TEuclideanShape >::init(), DGtal::GridCurve< TKSpace >::initFromVector(), K, DGtal::trace, and DGtal::Surfaces< TKSpace >::track2DBoundaryPoints().