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vigra/random_forest/rf_region.hxx |

    00001 /************************************************************************/
    00002 /*                                                                      */
    00003 /*        Copyright 2008-2009 by  Ullrich Koethe and Rahul Nair         */
    00004 /*                                                                      */
    00005 /*    This file is part of the VIGRA computer vision library.           */
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    00009 /*        ullrich.koethe@iwr.uni-heidelberg.de    or                    */
    00010 /*        vigra@informatik.uni-hamburg.de                               */
    00011 /*                                                                      */
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    00020 /*                                                                      */
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    00023 /*    Software.                                                         */
    00024 /*                                                                      */
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    00033 /*                                                                      */
    00034 /************************************************************************/
    00035 #ifndef VIGRA_RANDOM_FOREST_REGION_HXX
    00036 #define VIGRA_RANDOM_FOREST_REGION_HXX
    00037 #include <algorithm>
    00038 #include <map>
    00039 #include <numeric>
    00040 #include "vigra/mathutil.hxx"
    00041 #include "vigra/array_vector.hxx"
    00042 #include "vigra/sized_int.hxx"
    00043 #include "vigra/matrix.hxx"
    00044 #include "vigra/random.hxx"
    00045 #include "vigra/functorexpression.hxx"
    00046
    00047
    00048
    00049 namespace vigra
    00050 {
    00051
    00052
    00053 /** Standard Stackentry used to Build a Tree. Contains Information
    00054  * About the current region being split
    00055  */
    00056 template <class Iter>
    00057 class DT_StackEntry
    00058 {
    00059   public:
    00060     typedef Iter IndexIterator;
    00061     // tree specific stuff
    00062     enum  ParentTag
    00063     {
    00064         DecisionTreeNoParent = -1
    00065     };
    00066
    00067     /** Address of left and Right parent in the topology container
    00068      */
    00069     Int32                                   leftParent;
    00070     Int32                                   rightParent;
    00071     /** rule associated with current node
    00072      */
    00073     ArrayVector<std::pair<Int32, double> >  rule;
    00074
    00075
    00076     // RegionSpecificStuff
    00077     ArrayVector<double>                     classCounts_;
    00078     ArrayVector<double>                     weightedClassCounts_;
    00079     bool                                    classCountsIsValid;
    00080     bool                                    weightedClassCountsIsValid;
    00081     IndexIterator                           begin_,  end_;
    00082     int                                     size_;
    00083     IndexIterator                           oob_begin_, oob_end_;
    00084     int                                     oob_size_;
    00085
    00086     Int32 depth()
    00087     {
    00088         return rule.size();
    00089     }
    00090
    00091     void setRange(IndexIterator s, IndexIterator e)
    00092     {
    00093         begin_      = s;
    00094         end_        = e;
    00095         size_       = e-s;
    00096     }
    00097     void set_oob_range(IndexIterator s, IndexIterator e)
    00098     {
    00099         oob_begin_   = s;
    00100         oob_end_     = e;
    00101         oob_size_       = e-s;
    00102     }
    00103
    00104     void reset()
    00105     {
    00106         begin_      = end_      = IndexIterator();
    00107         oob_begin_  = oob_end_  = IndexIterator();
    00108         size_       = oob_size_ = 0;
    00109         leftParent  = DecisionTreeNoParent;
    00110         rightParent = DecisionTreeNoParent;
    00111         classCountsIsValid = false;
    00112     }
    00113
    00114     bool  isPure()
    00115     {
    00116         int num = 0;
    00117
    00118         for(int ii = 0; ii < (int)classCounts().size(); ++ii)
    00119         {
    00120             num += classCounts()[ii] > 0;
    00121         }
    00122         return num <= 1;
    00123     }
    00124
    00125     int&  operator[](int i)
    00126     {
    00127         return *(begin_+i);
    00128     }
    00129
    00130     IndexIterator & begin()
    00131     {
    00132         return begin_;
    00133     }
    00134
    00135     IndexIterator & end()
    00136     {
    00137         return end_;
    00138     }
    00139     IndexIterator & oob_begin()
    00140     {
    00141         return oob_begin_;
    00142     }
    00143
    00144     IndexIterator & oob_end()
    00145     {
    00146         return oob_end_;
    00147     }
    00148     ArrayVector<double> & classCounts()
    00149     {
    00150         return classCounts_;
    00151     }
    00152     ArrayVector<double> & weightedClassCounts()
    00153     {
    00154         return classCounts_;
    00155     }
    00156     bool  classCountsValid(bool u)
    00157     {
    00158         classCountsIsValid = u;
    00159         return classCountsIsValid;
    00160
    00161     }
    00162
    00163     void classCounts(ArrayVector<Int32> in);
    00164
    00165     DT_StackEntry( IndexIterator i, IndexIterator e,
    00166                         int classCount,
    00167                         Int32 lp = DecisionTreeNoParent,
    00168                         Int32 rp = DecisionTreeNoParent)
    00169     :
    00170         leftParent(lp),
    00171         rightParent(rp),
    00172         classCounts_(classCount, 0u),
    00173         classCountsIsValid(false),
    00174         begin_(i),
    00175         end_(e),
    00176         size_(e-i)
    00177     {}
    00178
    00179
    00180     Int32 size()const
    00181     {
    00182         return size_;
    00183     }
    00184
    00185
    00186     Int32 oob_size()const
    00187     {
    00188         return oob_size_;
    00189     }
    00190
    00191 };
    00192
    00193
    00194 }
    00195 //namespace vigra
    00196
    00197 #endif // VIGRA_RANDOM_FOREST_REGION_HXX

© Ullrich Köthe (ullrich.koethe@iwr.uni-heidelberg.de) Heidelberg Collaboratory for Image Processing, University of Heidelberg, Germany | html generated using doxygen and Python vigra 1.7.1 (3 Dec 2010)