GestureRecognitionToolkit  Version: 0.2.5
The Gesture Recognition Toolkit (GRT) is a cross-platform, open-source, c++ machine learning library for real-time gesture recognition.
SoftmaxModel.h
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1 
29 #ifndef GRT_SOFTMAX_MODEL_HEADER
30 #define GRT_SOFTMAX_MODEL_HEADER
31 
32 #include "../../CoreModules/Classifier.h"
33 
34 GRT_BEGIN_NAMESPACE
35 
37 public:
38  SoftmaxModel(){
39  classLabel = 0;
40  N = 0;
41  }
42  ~SoftmaxModel(){
43 
44  }
45 
46  bool init(UINT classLabel,UINT N){
47  this->classLabel = classLabel;
48  this->N = N;
49 
50  //Resize the weights
51  w.clear();
52  w.resize(N);
53 
54  //Randomize the weights
55  Random rand;
56  for(UINT i=0; i<N; i++){
57  w[i] = rand.getRandomNumberUniform(-0.1,0.1);
58  }
59  w0 = rand.getRandomNumberUniform(-0.1,0.1);
60 
61  return true;
62  }
63 
64  Float compute(const VectorFloat &x){
65  Float sum = w0;
66  for(UINT i=0; i<N; i++){
67  sum += x[i]*w[i];
68  }
69  return 1.0 / (1.0+exp(-sum));
70  }
71 
72  UINT classLabel;
73  UINT N; //The number of dimensions
74  VectorFloat w; //The coefficents
75  Float w0;
76 
77 };
78 
79 GRT_END_NAMESPACE
80 
81 #endif //SoftmaxModel
82 
This file contains the Random class, a useful wrapper for generating cross platform random functions...
Definition: Random.h:46
virtual bool resize(const unsigned int size)
Definition: Vector.h:133
Float getRandomNumberUniform(Float minRange=0.0, Float maxRange=1.0)
Definition: Random.cpp:129