testTrueLocalEstimator.cpp

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#include <iostream>
#include "DGtal/base/Common.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/Shapes.h"
#include "DGtal/shapes/ShapeFactory.h"
#include "DGtal/shapes/GaussDigitizer.h"
 
#include "DGtal/geometry/curves/GridCurve.h"
#include "DGtal/geometry/curves/ArithmeticalDSSComputer.h"
#include "DGtal/geometry/curves/estimation/CCurveLocalGeometricEstimator.h"
#include "DGtal/geometry/curves/estimation/TrueLocalEstimatorOnPoints.h"
#include "DGtal/geometry/curves/estimation/TrueGlobalEstimatorOnPoints.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/estimation/CompareLocalEstimators.h"
 
 
#include "ConfigTest.h"
 
 
using namespace std;
using namespace DGtal;
 
// Functions for testing class TrueLocalEstimator.
 
bool testTrueLocalEstimator(const std::string &filename)
{
  trace.info() << "Reading GridCurve " << endl;
  ifstream instream; // input stream
  instream.open (filename.c_str(), ifstream::in);
  typedef KhalimskySpaceND<2> Kspace; //space
  GridCurve<Kspace> c; 
  c.initFromVectorStream(instream); //building grid curve
  typedef GridCurve<Kspace >::PointsRange Range;//range
  Range r = c.getPointsRange();//building range
 
  typedef Ball2D<Z2i::Space> Shape;
  typedef GridCurve<KhalimskySpaceND<2> >::PointsRange Range;
  typedef Range::ConstIterator ConstIteratorOnPoints;
  typedef ParametricShapeCurvatureFunctor< Shape > Curvature;
  typedef ParametricShapeTangentFunctor< Shape > Tangent;
  typedef ParametricShapeArcLengthFunctor< Shape > Length;
 
  Shape ball(Z2i::Point(0,0), 30);
 
   
  typedef TrueLocalEstimatorOnPoints< ConstIteratorOnPoints, Shape, Curvature  > TrueCurvatureEstimator;
  typedef TrueLocalEstimatorOnPoints< ConstIteratorOnPoints, Shape, Tangent  > TrueTangentEstimator;
  typedef TrueGlobalEstimatorOnPoints< ConstIteratorOnPoints, Shape, Length  >  TrueLengthEstimator;
 
  BOOST_CONCEPT_ASSERT(( concepts::CCurveLocalGeometricEstimator< TrueCurvatureEstimator > ));
  BOOST_CONCEPT_ASSERT(( concepts::CCurveLocalGeometricEstimator< TrueTangentEstimator > ));
  TrueCurvatureEstimator curvatureEstimator;
  TrueTangentEstimator tangentEstimator;
  TrueLengthEstimator lengthEstimator;
 
  curvatureEstimator.attach( ball );
  tangentEstimator.attach( ball );
  lengthEstimator.attach ( ball );
 
  ConstIteratorOnPoints it = r.begin();
  ConstIteratorOnPoints it2 = it+15;
 
  trace.info() << "Current point = " << *it << std::endl;
  trace.info() << "Current point+15 = " << *it2 << std::endl;
  // TODO: All these estimations consider projections of points from grid curve c on ball.
  //       These are not estimations on the grid curve c. Not sure that make sense.
  trace.info() << "Eval curvature (begin, h=1) = " << curvatureEstimator.eval(it2, 1.) << std::endl;
  trace.info() << "Eval tangent (begin, h=1) = " << tangentEstimator.eval(it2, 1.) << std::endl;
  trace.info() << "Eval length (h=1) = " << lengthEstimator.eval(it, it2, 1.) << std::endl;
  trace.info() << "Eval ball length (h=1) = " << lengthEstimator.eval() << std::endl;
 
  return true;
}
 
template <typename Shape>
bool 
testTrueLocalEstimatorOnShapeDigitization( const string & name,
             Shape & aShape, double h )
{
  using namespace Z2i;
 
  trace.beginBlock ( ( "Testing TrueLocalEstimator on digitization of "
           + name ). c_str() );
  
  // Creates a digitizer on the window (xLow, xUp).
  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 << "[testTrueLocalEstimatorOnShapeDigitization]"
              << " 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;
      typedef ParametricShapeCurvatureFunctor< Shape > Curvature;
 
      TrueLocalEstimatorOnPoints<ConstIteratorOnPoints, Shape, Curvature> curvatureEstimator;
      Range r = gridcurve.getPointsRange();//building range
      curvatureEstimator.attach( aShape ); 
 
      std::cout << "# idx x y kappa" << endl;
      unsigned int i = 0;
      for ( ConstIteratorOnPoints it = r.begin(), ite = r.end();
            it != ite; ++it, ++i )
      {
        const RealPoint& x = *it; 
        const double kappa = curvatureEstimator.eval( it, h );
        std::cout << i << " " << x[0] << " " << x[1] 
                  << " " << kappa << std::endl;
      }
    }
    catch ( InputException& e )
    {
      std::cerr << "[testTrueLocalEstimatorOnShapeDigitization]"
          << " error in finding a bel." << std::endl;
      ok = false;
    }
  }
  trace.emphase() << ( ok ? "Passed." : "Error." ) << endl;
  trace.endBlock();
  return ok;
}
 
 
// Standard services - public :
 
int main( int argc, char** argv )
{
  trace.beginBlock ( "Testing class TrueLocalEstimator" );
  trace.info() << "Args:";
  for ( int i = 0; i < argc; ++i )
    trace.info() << " " << argv[ i ];
  trace.info() << endl;
 
  std::string sinus2D4 = testPath + "samples/sinus2D4.dat";
 
  bool res = testTrueLocalEstimator(sinus2D4); // && ... other tests
  trace.emphase() << ( res ? "Passed." : "Error." ) << endl;
  trace.endBlock();
 
  typedef Ellipse2D< Z2i::Space > MyEllipse;
  MyEllipse ellipse( 1.2, 0.1, 4.0, 3.0, 0.3 );
  res = res && 
    testTrueLocalEstimatorOnShapeDigitization<MyEllipse>
    ( "Ellipse-4-3-0.3-s1", ellipse, 1 );
  res = res && 
    testTrueLocalEstimatorOnShapeDigitization<MyEllipse>
    ( "Ellipse-4-3-0.3-s0.5", ellipse, 0.5 );
 
  typedef Flower2D< Z2i::Space > MyFlower;
  MyFlower flower( 0.5, -2.3, 5.0, 0.7, 6, 0.3 );
  res = res && 
    testTrueLocalEstimatorOnShapeDigitization<MyFlower>
    ( "Flower-5-0.3-6-0.3-s1", flower, 1 );
  res = res && 
    testTrueLocalEstimatorOnShapeDigitization<MyFlower>
    ( "Flower-5-0.3-6-0.3-s0.25", flower, 0.25 );
 
  return res ? 0 : 1;
}
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