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Autoencoder.h
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1 /*
2  * Copyright (c) 2014, Shogun Toolbox Foundation
3  * All rights reserved.
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5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions are met:
7 
8  * 1. Redistributions of source code must retain the above copyright notice,
9  * this list of conditions and the following disclaimer.
10  *
11  * 2. Redistributions in binary form must reproduce the above copyright notice,
12  * this list of conditions and the following disclaimer in the documentation
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16  * contributors may be used to endorse or promote products derived from this
17  * software without specific prior written permission.
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19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
20  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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30  *
31  * Written (W) 2014 Khaled Nasr
32  */
33 
34 #ifndef __AUTOENCODER_H__
35 #define __AUTOENCODER_H__
36 
37 #include <shogun/lib/common.h>
40 
41 namespace shogun
42 {
43 template <class T> class CDenseFeatures;
44 class CNeuralConvolutionalLayer;
45 
48 {
51 
54 
57 };
58 
87 {
88 public:
90  CAutoencoder();
91 
103  CAutoencoder(int32_t num_inputs, CNeuralLayer* hidden_layer,
104  CNeuralLayer* decoding_layer=NULL, float64_t sigma = 0.01);
105 
117  CAutoencoder(int32_t input_width, int32_t input_height, int32_t input_num_channels,
118  CNeuralConvolutionalLayer* hidden_layer,
119  CNeuralConvolutionalLayer* decoding_layer, float64_t sigma = 0.01);
120 
127  virtual bool train(CFeatures* data);
128 
137 
146 
159  {
162  }
163 
164  virtual ~CAutoencoder() {}
165 
166  virtual const char* get_name() const { return "Autoencoder"; }
167 
168 protected:
176 
177 private:
178  void init();
179 
181  template<class T>
182  SGVector<T> get_section(SGVector<T> v, int32_t i);
183 
184 public:
196 
199 
200 protected:
211 };
212 }
213 #endif

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