DGtal  1.1.0
TwoStepLocalLengthEstimator.ih
1 /**
2  * This program is free software: you can redistribute it and/or modify
3  * it under the terms of the GNU Lesser General Public License as
4  * published by the Free Software Foundation, either version 3 of the
5  * License, or (at your option) any later version.
6  *
7  * This program is distributed in the hope that it will be useful,
8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10  * GNU General Public License for more details.
11  *
12  * You should have received a copy of the GNU General Public License
13  * along with this program. If not, see <http://www.gnu.org/licenses/>.
14  *
15  **/
16 
17 /**
18  * @file TwoStepLocalLengthEstimator.ih
19  * @author David Coeurjolly (\c david.coeurjolly@liris.cnrs.fr )
20  * Laboratoire d'InfoRmatique en Image et Systèmes d'information - LIRIS (CNRS, UMR 5205), CNRS, France
21  *
22  * @date 2011/06/27
23  *
24  * Implementation of inline methods defined in TwoStepLocalLengthEstimator.h
25  *
26  * This file is part of the DGtal library.
27  */
28 
29 
30 //////////////////////////////////////////////////////////////////////////////
31 #include <cstdlib>
32 //////////////////////////////////////////////////////////////////////////////
33 
34 ///////////////////////////////////////////////////////////////////////////////
35 // IMPLEMENTATION of inline methods.
36 ///////////////////////////////////////////////////////////////////////////////
37 
38 ///////////////////////////////////////////////////////////////////////////////
39 // ----------------------- Standard services ------------------------------
40 
41 template <typename T>
42 inline
43 DGtal::TwoStepLocalLengthEstimator<T>::TwoStepLocalLengthEstimator(const double wdirect, const double wdiag)
44  : myWeightDirect(wdirect), myWeightDiagonal(wdiag)
45 {}
46 
47 ///////////////////////////////////////////////////////////////////////////////
48 // Interface - public :
49 
50 template <typename T>
51 inline
52 typename DGtal::TwoStepLocalLengthEstimator<T>::Quantity
53 DGtal::TwoStepLocalLengthEstimator<T>::eval(const ConstIterator& itb,
54  const ConstIterator& ite, const double h) const
55 {
56  ASSERT(h > 0);
57 
58  if ( DGtal::isEmpty(itb,ite) )
59  return 0.;
60 
61  unsigned int nbDirect=0;
62  unsigned int nbDiag=0;
63 
64  ConstIterator i = itb, ii = itb;
65  ++ii;
66 
67  do
68  {
69  if ((i->second).dot(ii->second) == 0)
70  nbDiag++;
71  else
72  nbDirect+=2;
73 
74  ++i;
75  if (i == ite)
76  continue;
77 
78  ++i; ++ii;
79 
80  if (ii == ite)
81  continue;
82 
83  ++ii;
84  }
85  while ( (i != ite) && (ii != ite) );
86 
87  if ( i != ite )
88  nbDirect++;
89 
90  return (nbDiag*myWeightDiagonal + nbDirect*myWeightDirect) * h;
91 }
92 
93 
94 
95 
96 
97 
98 // ------------------------------------------------------------------------
99 template <typename T>
100 inline
101 void
102 DGtal::TwoStepLocalLengthEstimator<T>::selfDisplay ( std::ostream & out ) const
103 {
104  out << "[TwoStepLocalLengthEstimator]";
105  if (isValid())
106  out <<" initialized";
107  else
108  out<< " not initialized";
109 }
110 
111 // ------------------------------------------------------------------------
112 template <typename T>
113 inline
114 bool
115 DGtal::TwoStepLocalLengthEstimator<T>::isValid() const
116 {
117  return true;
118 }
119 
120 
121 
122 ///////////////////////////////////////////////////////////////////////////////
123 // Implementation of inline functions //
124 
125 template <typename T>
126 inline
127 std::ostream&
128 DGtal::operator<< ( std::ostream & out,
129  const TwoStepLocalLengthEstimator<T> & object )
130 {
131  object.selfDisplay( out );
132  return out;
133 }
134 
135 // //
136 ///////////////////////////////////////////////////////////////////////////////
137 
138