1 | // Copyright (C) 2009 foam |
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2 | // |
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3 | // This program is free software; you can redistribute it and/or modify |
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4 | // it under the terms of the GNU General Public License as published by |
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5 | // the Free Software Foundation; either version 2 of the License, or |
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6 | // (at your option) any later version. |
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7 | // |
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8 | // This program is distributed in the hope that it will be useful, |
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9 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
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10 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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11 | // GNU General Public License for more details. |
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12 | // |
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13 | // You should have received a copy of the GNU General Public License |
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14 | // along with this program; if not, write to the Free Software |
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15 | // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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16 | |
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17 | #include <vector> |
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18 | #include <map> |
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19 | #include <set> |
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20 | #include "Vector.h" |
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21 | #include "Matrix.h" |
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22 | #include "Classifier.h" |
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23 | |
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24 | #ifndef FOAM_PCA |
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25 | #define FOAM_PCA |
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26 | |
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27 | // Principle component analysis |
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28 | |
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29 | class PCA |
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30 | { |
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31 | public: |
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32 | PCA(unsigned int FeatureSize); |
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33 | ~PCA(); |
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34 | |
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35 | typedef std::vector<Vector<float> > FeatureVec; |
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36 | |
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37 | void AddFeature(Vector<float> v) { m_Features.push_back(v); } |
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38 | void Calculate(); |
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39 | |
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40 | // remove eigenvectors from the transform |
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41 | void Compress(unsigned int s, unsigned int e); |
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42 | |
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43 | Vector<float> Project(Vector<float> v) const; |
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44 | Vector<float> Synth(Vector<float> v) const; |
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45 | |
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46 | static void RunTests(); |
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47 | |
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48 | const Vector<float> &GetEigenValues() const { return m_EigenValues; } |
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49 | const Matrix<float> &GetEigenTransform() const { return m_EigenTransform; } |
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50 | const FeatureVec &GetFeatures() const { return m_Features; } |
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51 | const Vector<float> &GetMean() const { return m_Mean; } |
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52 | unsigned int GetFeatureSize() const { return m_FeatureSize; } |
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53 | unsigned int GetParamsSize() const { return m_EigenTransform.GetRows(); } |
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54 | |
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55 | |
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56 | void Load(FILE *f); |
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57 | void Save(FILE *f); |
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58 | |
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59 | private: |
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60 | |
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61 | void CalcMean(); |
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62 | |
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63 | |
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64 | FeatureVec m_Features; |
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65 | unsigned int m_FeatureSize; |
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66 | Vector<float> m_Mean; |
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67 | |
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68 | Vector<float> m_EigenValues; |
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69 | Matrix<float> m_EigenTransform; |
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70 | |
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71 | }; |
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72 | |
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73 | #endif |
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