DGtal  0.9.4beta
tutorial-examples/volDTGranulo.cpp

Example of tutorial 3: Volumetric analysis and Granulometry

See also
Tutorial: Volumetric analysis and Granulometry
tutoVolDTGranulometry.png
result on obtained examples/samples/Al.100.vol.
#include <iostream>
#include <fstream>
#include <algorithm>
#include "DGtal/base/Common.h"
#include "DGtal/helpers/StdDefs.h"
#include "DGtal/images/ImageContainerBySTLVector.h"
#include "DGtal/io/readers/VolReader.h"
#include "DGtal/io/writers/VolWriter.h"
#include "DGtal/images/SimpleThresholdForegroundPredicate.h"
#include "DGtal/geometry/volumes/distance/DistanceTransformation.h"
#include "DGtal/shapes/implicit/ImplicitBall.h"
#include "DGtal/base/BasicFunctors.h"
#include "DGtal/io/viewers/Viewer3D.h"
#include "DGtal/io/colormaps/GradientColorMap.h"
using namespace DGtal;
int main(int argc, char ** argv)
{
//Loarding the image
Image image = VolReader<Image>::importVol(argv[1]);
trace.info() << image << std::endl;
//Viewer
QApplication application(argc,argv);
Viewer3D<> viewer;
viewer.show();
for(Image::Domain::ConstIterator it = image.domain().begin(),
itend = image.domain().end(); it != itend; ++it)
if (image(*it) != 0)
viewer << *it;
viewer << DGtal::Viewer3D<>::updateDisplay;
trace.info() << "viewer launched..."<<std::endl;
bool res = application.exec();
//DT
Predicate binaryshape(image, 0);
DT distancemap(image.domain(), binaryshape, l2);
//Viewer
QApplication application2(argc,argv);
Viewer3D<> viewer2;
viewer2.show();
DT::Value maxDT = (*std::max_element(distancemap.constRange().begin(),
distancemap.constRange().end()));
GradientColorMap<DT::Value> gradient( 0, maxDT);
trace.info() << "we display the dt map"<<std::endl;
int cpt=0;
viewer2 << DGtal::ClippingPlane(1,0,0,-10.1);
for(DT::Domain::ConstIterator it = distancemap.domain().begin(),
itend = distancemap.domain().end(); it != itend;
++it)
if (distancemap(*it) > 0)
{
DT::Value val= distancemap( *it );
DGtal::Color c= gradient(val);
viewer2 << DGtal::CustomColors3D(c,c) << *it ;
cpt++;
}
trace.info() << "Got "<<cpt<<" points."<<std::endl;
viewer2 << DGtal::Viewer3D<>::updateDisplay;
trace.info() << "viewer2 launched..."<<std::endl;
res = res && application2.exec();
//Granulo
Image imageGranulo ( image.domain() );
for(Image::Range::Iterator it = imageGranulo.range().begin(), itend= imageGranulo.range().end();
it != itend; ++it)
*it = 0;
trace.info() << "Computing the granulometry"<<std::endl;
cpt=0;
for(Image::Domain::ConstIterator it = imageGranulo.domain().begin(),
itend = imageGranulo.domain().end(); it != itend; ++it)
{
if (distancemap(*it) > 0)
{
//Construct the sphere with radius from distancemap(*it)
Z3i::RealPoint center = *it;
unsigned int radius = (unsigned int)distancemap(*it);
ImplicitBall<Z3i::Space> ball(center,radius);
Z3i::Point low = center - Z3i::Point::diagonal( radius+1 );
Z3i::Point up = center + Z3i::Point::diagonal( radius+1 );
Z3i::Domain dom(low,up);
for(Z3i::Domain::ConstIterator itball = dom.begin(), itendball= dom.end();
itball != itendball; itball++)
if (imageGranulo.domain().isInside(*itball) &&
( ball(*itball) > 0) &&
(imageGranulo(*itball) < radius))
imageGranulo.setValue(*itball, radius);
cpt++;
}
}
trace.info() << "Granulometry ok nbBalls="<<cpt<< std::endl;
VolWriter<Image, functors::Cast<unsigned char> >::exportVol("granulo.vol", imageGranulo);
trace.info() << "Save OK"<< std::endl;
//Viewer
QApplication application3(argc,argv);
Viewer3D<> viewer3;
viewer3.show();
Image::Value maxG = (*std::max_element(imageGranulo.constRange().begin(),
imageGranulo.constRange().end()));
GradientColorMap<Image::Value> gradient2( 0, maxG);
viewer3 << DGtal::ClippingPlane(1,0,0,-10.1);
cpt=0;
for(Image::Domain::ConstIterator it = imageGranulo.domain().begin(),
itend = imageGranulo.domain().end(); it != itend;
++it)
if (imageGranulo(*it) > 0)
{
Image::Value val= imageGranulo( *it );
DGtal::Color c = gradient2(val);
viewer3 << DGtal::CustomColors3D(c,c) << *it ;
cpt++;
}
trace.info() << "Got "<<cpt<<" points."<<std::endl;
viewer3 << DGtal::Viewer3D<>::updateDisplay;
trace.info() << "viewer3 launched..."<<std::endl;
return application3.exec();
}