bilateral.h 5.67 KB
Newer Older
Pierre Kraemer's avatar
Pierre Kraemer committed
1 2 3
/*******************************************************************************
* CGoGN: Combinatorial and Geometric modeling with Generic N-dimensional Maps  *
* version 0.1                                                                  *
4
* Copyright (C) 2009-2012, IGG Team, LSIIT, University of Strasbourg           *
Pierre Kraemer's avatar
Pierre Kraemer committed
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
*                                                                              *
* This library 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 2.1 of the License, or (at your     *
* option) any later version.                                                   *
*                                                                              *
* This library 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 Lesser General Public License  *
* for more details.                                                            *
*                                                                              *
* You should have received a copy of the GNU Lesser General Public License     *
* along with this library; if not, write to the Free Software Foundation,      *
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA.           *
*                                                                              *
20
* Web site: http://cgogn.unistra.fr/                                           *
Pierre Kraemer's avatar
Pierre Kraemer committed
21 22 23 24 25
* Contact information: cgogn@unistra.fr                                        *
*                                                                              *
*******************************************************************************/

#include <math.h>
26
#include "Topology/generic/traversorCell.h"
Pierre Kraemer's avatar
Pierre Kraemer committed
27 28 29 30 31 32 33

namespace CGoGN
{

namespace Algo
{

34 35 36
namespace Surface
{

Pierre Kraemer's avatar
Pierre Kraemer committed
37
namespace Filtering
Pierre Kraemer's avatar
Pierre Kraemer committed
38 39 40
{

template <typename PFP>
Pierre Kraemer's avatar
Pierre Kraemer committed
41
void sigmaBilateral(typename PFP::MAP& map, const VertexAttribute<typename PFP::VEC3, typename PFP::MAP::IMPL>& position, const VertexAttribute<typename PFP::VEC3, typename PFP::MAP::IMPL>& normal, float& sigmaC, float& sigmaS)
Pierre Kraemer's avatar
Pierre Kraemer committed
42 43 44 45 46 47 48
{
	typedef typename PFP::VEC3 VEC3 ;

	float sumLengths = 0.0f ;
	float sumAngles = 0.0f ;
	long nbEdges = 0 ;

49
	TraversorE<typename PFP::MAP> t(map);
50
	for(Dart d = t.begin(); d != t.end(); d = t.next())
Pierre Kraemer's avatar
Pierre Kraemer committed
51
	{
Sylvain Thery's avatar
Sylvain Thery committed
52
		sumLengths += Algo::Surface::Geometry::edgeLength<PFP>(map, d, position) ;
Pierre Kraemer's avatar
Pierre Kraemer committed
53 54
		sumAngles += Geom::angle(normal[d], normal[map.phi1(d)]) ;
		++nbEdges ;
Pierre Kraemer's avatar
Pierre Kraemer committed
55 56 57 58 59 60 61 62
	}

	// update of returned values
	sigmaC = 1.0f * ( sumLengths / float(nbEdges) ) ;
	sigmaS = 2.5f * ( sumAngles / float(nbEdges) ) ;
}

template <typename PFP>
Pierre Kraemer's avatar
Pierre Kraemer committed
63
void filterBilateral(typename PFP::MAP& map, const VertexAttribute<typename PFP::VEC3, typename PFP::MAP::IMPL>& position, VertexAttribute<typename PFP::VEC3, typename PFP::MAP::IMPL>& position2, const VertexAttribute<typename PFP::VEC3, typename PFP::MAP::IMPL>& normal)
Pierre Kraemer's avatar
Pierre Kraemer committed
64 65 66 67
{
	typedef typename PFP::VEC3 VEC3 ;

	float sigmaC, sigmaS ;
68
	sigmaBilateral<PFP>(map, position, normal, sigmaC, sigmaS) ;
Pierre Kraemer's avatar
Pierre Kraemer committed
69

70
	TraversorV<typename PFP::MAP> t(map) ;
71
	for(Dart d = t.begin(); d != t.end(); d = t.next())
Pierre Kraemer's avatar
Pierre Kraemer committed
72
	{
73
		if(!map.isBoundaryVertex(d))
Pierre Kraemer's avatar
Pierre Kraemer committed
74
		{
Pierre Kraemer's avatar
Pierre Kraemer committed
75 76 77
			// get normal of vertex
			const VEC3& normal_d = normal[d] ;

78 79 80 81 82
			// traversal of incident edges
			float sum = 0.0f, normalizer = 0.0f ;
			Traversor2VE<typename PFP::MAP> te(map, d) ;
			for(Dart it = te.begin(); it != te.end(); it = te.next())
			{
Sylvain Thery's avatar
Sylvain Thery committed
83
				VEC3 vec = Algo::Surface::Geometry::vectorOutOfDart<PFP>(map, it, position) ;
84 85 86 87 88 89
				float h = normal_d * vec ;
				float t = vec.norm() ;
				float wcs = exp( ( -1.0f * (t * t) / (2.0f * sigmaC * sigmaC) ) + ( -1.0f * (h * h) / (2.0f * sigmaS * sigmaS) ) ) ;
				sum += wcs * h ;
				normalizer += wcs ;
			}
Pierre Kraemer's avatar
Pierre Kraemer committed
90

Pierre Kraemer's avatar
Pierre Kraemer committed
91
			position2[d] = position[d] + ((sum / normalizer) * normal_d) ;
92 93 94
		}
		else
			position2[d] = position[d] ;
Pierre Kraemer's avatar
Pierre Kraemer committed
95 96 97 98
	}
}

template <typename PFP>
Pierre Kraemer's avatar
Pierre Kraemer committed
99
void filterSUSAN(typename PFP::MAP& map, float SUSANthreshold, const VertexAttribute<typename PFP::VEC3, typename PFP::MAP::IMPL>& position, VertexAttribute<typename PFP::VEC3, typename PFP::MAP::IMPL>& position2, const VertexAttribute<typename PFP::VEC3, typename PFP::MAP::IMPL>& normal)
Pierre Kraemer's avatar
Pierre Kraemer committed
100 101 102 103
{
	typedef typename PFP::VEC3 VEC3 ;

	float sigmaC, sigmaS ;
104
	sigmaBilateral<PFP>(map, position, normal, sigmaC, sigmaS) ;
Pierre Kraemer's avatar
Pierre Kraemer committed
105 106 107 108

	long nbTot = 0 ;
	long nbSusan = 0 ;

109
	TraversorV<typename PFP::MAP> t(map) ;
110
	for(Dart d = t.begin(); d != t.end(); d = t.next())
Pierre Kraemer's avatar
Pierre Kraemer committed
111
	{
112
		if(!map.isBoundaryVertex(d))
Pierre Kraemer's avatar
Pierre Kraemer committed
113
		{
114 115 116 117 118 119 120 121 122
			// get position & normal of vertex
			const VEC3& pos_d = position[d] ;
			const VEC3& normal_d = normal[d] ;

			// traversal of incident edges
			float sum = 0.0f, normalizer = 0.0f ;
			bool SUSANregion = false ;
			Traversor2VE<typename PFP::MAP> te(map, d) ;
			for(Dart it = te.begin(); it != te.end(); it = te.next())
Pierre Kraemer's avatar
Pierre Kraemer committed
123
			{
124 125 126 127
				const VEC3& neighborNormal = normal[map.phi1(it)] ;
				float angle = Geom::angle(normal_d, neighborNormal) ;
				if( angle <= SUSANthreshold )
				{
Sylvain Thery's avatar
Sylvain Thery committed
128
					VEC3 vec = Algo::Surface::Geometry::vectorOutOfDart<PFP>(map, it, position) ;
129 130 131 132 133 134 135 136
					float h = normal_d * vec ;
					float t = vec.norm() ;
					float wcs = exp( ( -1.0f * (t * t) / (2.0f * sigmaC * sigmaC) ) + ( -1.0f * (h * h) / (2.0f * sigmaS * sigmaS) ) );
					sum += wcs * h ;
					normalizer += wcs ;
				}
				else
					SUSANregion = true ;
137
			}
Pierre Kraemer's avatar
Pierre Kraemer committed
138

139 140 141
			if(SUSANregion)
				nbSusan++ ;
			nbTot++ ;
Pierre Kraemer's avatar
Pierre Kraemer committed
142

143 144 145 146 147
			if (normalizer != 0.0f)
				position2[d] = pos_d + ((sum / normalizer) * normal_d) ;
			else
				position2[d] = pos_d ;
		}
Pierre Kraemer's avatar
Pierre Kraemer committed
148
		else
149
			position2[d] = position[d] ;
Pierre Kraemer's avatar
Pierre Kraemer committed
150 151
	}

152
//	CGoGNout <<" susan rate = "<< float(nbSusan)/float(nbTot)<<CGoGNendl;
Pierre Kraemer's avatar
Pierre Kraemer committed
153 154
}

Pierre Kraemer's avatar
Pierre Kraemer committed
155
} //namespace Filtering
Pierre Kraemer's avatar
Pierre Kraemer committed
156

157 158
}

Pierre Kraemer's avatar
Pierre Kraemer committed
159 160 161
} //namespace Algo

} //namespace CGoGN