examplePlaneProbingSurfaceLocalEstimator.cpp File Reference

#include <iostream>
#include <unordered_map>
#include "ConfigExamples.h"
#include "DGtal/helpers/StdDefs.h"
#include "DGtal/base/Common.h"
#include "DGtal/geometry/surfaces/estimation/PlaneProbingTetrahedronEstimator.h"
#include "DGtal/geometry/surfaces/estimation/PlaneProbingParallelepipedEstimator.h"
#include "DGtal/geometry/surfaces/DigitalSurfacePredicate.h"
#include "DGtal/geometry/surfaces/estimation/PlaneProbingDigitalSurfaceLocalEstimator.h"
#include "DGtal/helpers/Shortcuts.h"
#include "DGtal/helpers/ShortcutsGeometry.h"
#include "DGtal/io/viewers/PolyscopeViewer.h"

Include dependency graph for examplePlaneProbingSurfaceLocalEstimator.cpp:

Go to the source code of this file.

Typedefs
using	SH3 = Shortcuts<KSpace>
using	SHG3 = ShortcutsGeometry<KSpace>
using	Surfel = SH3::Surfel

Functions
RealPoint	centerSurfel (KSpace const &K, SH3::SCell const &s)
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

Jocelyn Meyron (jocel.nosp@m.yn.m.nosp@m.eyron.nosp@m.@lir.nosp@m.is.cn.nosp@m.rs.f.nosp@m.r ) Laboratoire d'InfoRmatique en Image et Systemes d'information - LIRIS (CNRS, UMR 5205), CNRS, France

Date

2020/12/07

An example file that shows how to construct and use a PlaneProbingDigitalSurfaceLocalEstimator.

This file is part of the DGtal library.

Definition in file examplePlaneProbingSurfaceLocalEstimator.cpp.

Typedef Documentation

SH3

using SH3 = Shortcuts<KSpace>

Definition at line 49 of file examplePlaneProbingSurfaceLocalEstimator.cpp.

SHG3

using SHG3 = ShortcutsGeometry<KSpace>

Definition at line 50 of file examplePlaneProbingSurfaceLocalEstimator.cpp.

Surfel

using Surfel = SH3::Surfel

Definition at line 52 of file examplePlaneProbingSurfaceLocalEstimator.cpp.

Function Documentation

centerSurfel()

RealPoint centerSurfel	(	KSpace const &	K,
		SH3::SCell const &	s )

Definition at line 57 of file examplePlaneProbingSurfaceLocalEstimator.cpp.

{
    auto pointels = SH3::getPrimalVertices(K, s, true);
 
    Point p = K.uCoords(pointels[0]),
          u = K.uCoords(pointels[1]) - p,
          v = K.uCoords(pointels[3]) - p;
 
    static const RealPoint shift(-0.5, -0.5, -0.5);
 
    return p + 0.5 * u + 0.5 * v + shift;
}

References DGtal::Shortcuts< KSpace >::getPrimalVertices(), and K.

Referenced by main().

main()

int main	(	int	argc,
		char **	argv )

[PlaneProbingDigitalSurfaceLocalEstimatorConstruction]

[PlaneProbingDigitalSurfaceLocalEstimatorConstruction]

[PlaneProbingDigitalSurfaceLocalEstimatorUsage]

[PlaneProbingDigitalSurfaceLocalEstimatorUsage]

Definition at line 72 of file examplePlaneProbingSurfaceLocalEstimator.cpp.

{
    std::string volfile = (argc > 1) ? argv[1] : (examplesPath + "samples/cat10.vol");
 
    auto params    = SH3::defaultParameters() | SHG3::defaultParameters();
    auto bimage    = SH3::makeBinaryImage(volfile, params);
    auto K         = SH3::getKSpace(bimage, params);
    auto surface   = SH3::makeDigitalSurface(bimage, K, params);
    auto surfels   = SH3::getSurfelRange(surface);
 
    Integer bound = params["maxAABB"].as<Integer>();
    double gridstep = params["gridstep"].as<double>();
 
    PolyscopeViewer<> viewer(K);

    using SurfacePredicate = DigitalSurfacePredicate<Surface>;
    using ProbingAlgorithm = PlaneProbingParallelepipedEstimator<SurfacePredicate, ProbingMode::R1>;
    // The general form is PlaneProbingDigitalSurfaceLocalEstimator<SurfaceType, ProbingAlgorithm>
    using Estimator        = PlaneProbingDigitalSurfaceLocalEstimator<Surface, ProbingAlgorithm>;
 
    // Parameters of the estimator:
    // - the probing factory
    Estimator::ProbingFactory probingFactory = [&bound](const Estimator::ProbingFrame& frame, const SurfacePredicate& surfacePredicate) {
        // If the base estimator is a PlaneProbingTetrahedronEstimator
        // return new ProbingAlgorithm(frame.p, { frame.b1, frame.b2, frame.normal }, surfacePredicate);
 
        // For a PlaneProbingParallelepipedEstimator
        return new ProbingAlgorithm(frame.p, { frame.b1, frame.b2, frame.normal }, surfacePredicate, bound);
    };
 
    // - an optional hashmap of pre-estimations
    std::unordered_map<Surfel, RealPoint> preEstimations;
    // The user can provide the pre-estimation
    // auto preEstimationsVector = SHG3::getCTrivialNormalVectors(surface, surfels, params);
    // for (std::size_t i = 0; i < surfels.size(); ++i)
    // {
    //     preEstimations[surfels[i]] = preEstimationsVector[i];
    // }
    // Or if it is not given, it is implicitly done inside the Estimator::eval function (using the MaximalSegmentSliceEstimation estimator)
 
    // - a verbosity flag
    bool verbose = true;
 
    Estimator estimator(surface, probingFactory, preEstimations, verbose);
    estimator.init(gridstep, surfels.begin(), surfels.end());

    // Evaluation on a range of surfels
    std::vector<Estimator::Quantity> quantities;
    estimator.eval(surfels.begin(), surfels.end(), std::back_inserter(quantities));
 
    // Or on one surfel 's'
    // Estimator::Quantity q = estiamtor.eval(s);
    Color fillColor = Color::White;
    int i = 0;
    for (auto it = surfels.begin(); it != surfels.end(); ++it, ++i)
    {
        const Surfel& s = *it;
        const Estimator::Quantity& n = quantities[i];
 
        RealPoint origin = centerSurfel(K, s);
 
        viewer.drawColor(fillColor);
        viewer << s;
 
        // Pre-estimation in red
        RealPoint const& preEstimation = estimator.getPreEstimation(it);
        viewer.drawColor(Color::Red);
        viewer.drawLine(origin, origin + 1.5 * preEstimation.getNormalized());
 
        // Estimated normal in green;
        viewer.drawColor(Color::Green);
        viewer.drawLine(origin, origin + 1.5 * n.getNormalized());
    }
 
    viewer.show();
    return 0;
}

References centerSurfel(), DGtal::Shortcuts< KSpace >::defaultParameters(), DGtal::ShortcutsGeometry< KSpace >::defaultParameters(), DGtal::Shortcuts< KSpace >::getKSpace(), DGtal::PointVector< dim, TEuclideanRing, TContainer >::getNormalized(), DGtal::Shortcuts< KSpace >::getSurfelRange(), DGtal::Color::Green, K, DGtal::Shortcuts< KSpace >::makeBinaryImage(), DGtal::Shortcuts< KSpace >::makeDigitalSurface(), DGtal::Color::Red, surface, and DGtal::Color::White.