DGtal 1.3.0
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Example of tutorial 3: Volumetric analysis and Granulometry

See also
Tutorial: Volumetric analysis and Granulometry
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"
#include <boost/algorithm/minmax_element.hpp>
using namespace DGtal;
int main(int argc, char ** argv)
//Loarding the image
trace.info() << image << std::endl;
QApplication application(argc,argv);
Viewer3D<> viewer;
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();
Predicate binaryshape(image, 0);
DT distancemap(image.domain(), binaryshape, l2);
QApplication application2(argc,argv);
Viewer3D<> viewer2;
DT::Value maxDT = (*boost::first_max_element(distancemap.constRange().begin(),
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;
if (distancemap(*it) > 0)
DT::Value val= distancemap( *it );
DGtal::Color c= gradient(val);
viewer2 << DGtal::CustomColors3D(c,c) << *it ;
trace.info() << "Got "<<cpt<<" points."<<std::endl;
viewer2 << DGtal::Viewer3D<>::updateDisplay;
trace.info() << "viewer2 launched..."<<std::endl;
res = res && application2.exec();
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;
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(ball.getLowerBound() - Z3i::RealPoint::diagonal(1.0), functors::Floor<>());
Z3i::Point up (ball.getUpperBound() + Z3i::RealPoint::diagonal(1.0), functors::Ceil<>());
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);
trace.info() << "Granulometry ok nbBalls="<<cpt<< std::endl;
VolWriter<Image, functors::Cast<unsigned char> >::exportVol("granulo.vol", imageGranulo);
trace.info() << "Save OK"<< std::endl;
QApplication application3(argc,argv);
Viewer3D<> viewer3;
Image::Value maxG = (*boost::first_max_element(imageGranulo.constRange().begin(),
GradientColorMap<Image::Value> gradient2( 0, maxG);
viewer3 << DGtal::ClippingPlane(1,0,0,-10.1);
for(Image::Domain::ConstIterator it = imageGranulo.domain().begin(),
itend = imageGranulo.domain().end(); it != itend;
if (imageGranulo(*it) > 0)
Image::Value val= imageGranulo( *it );
DGtal::Color c = gradient2(val);
viewer3 << DGtal::CustomColors3D(c,c) << *it ;
trace.info() << "Got "<<cpt<<" points."<<std::endl;
viewer3 << DGtal::Viewer3D<>::updateDisplay;
trace.info() << "viewer3 launched..."<<std::endl;
return res && application3.exec();
Structure representing an RGB triple with alpha component.
Definition: Color.h:68
static const Color Yellow
Definition: Color.h:422
static const Color Green
Definition: Color.h:417
static const Color Red
Definition: Color.h:416
static const Color Blue
Definition: Color.h:419
Aim: Implementation of the linear in time distance transformation for separable metrics.
Aim: implements separable l_p metrics with exact predicates.
Aim: This class template may be used to (linearly) convert scalar values in a given range into a colo...
void addColor(const Color &color)
Iterator for HyperRectDomain.
const ConstIterator & begin() const
const ConstIterator & end() const
const Domain & domain() const
Definition: Image.h:192
Range range()
Definition: Image.h:214
ConstRange constRange() const
Definition: Image.h:203
void setValue(const Point &aPoint, const Value &aValue)
Definition: Image.h:247
Aim: model of CEuclideanOrientedShape and CEuclideanBoundedShape concepts to create a ball in nD....
Definition: ImplicitBall.h:65
RealPoint getUpperBound() const
Definition: ImplicitBall.h:120
RealPoint getLowerBound() const
Definition: ImplicitBall.h:114
Aim: Implements basic operations that will be used in Point and Vector classes.
Definition: PointVector.h:593
std::ostream & info()
virtual void show()
Overload QWidget method in order to add a call to updateList() method (to ensure that the lists are w...
Aim: Define a simple Foreground predicate thresholding image values given a single thresold....
DGtal is the top-level namespace which contains all DGtal functions and types.
Class for adding a Clipping plane through the Viewer3D stream. Realizes the concept CDrawableWithView...
Aim: implements methods to read a "Vol" file format.
Definition: VolReader.h:90
Aim: Export a 3D Image using the Vol formats.
Definition: VolWriter.h:69
Functor that rounds up.
Functor that rounds down.
int main()
Definition: testBits.cpp:56
ImageContainerBySTLVector< Domain, Value > Image