PLearn 0.1
LocalizedFeaturesLayerVariable.h
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00001 // -*- C++ -*-
00002 
00003 // PLearn (A C++ Machine Learning Library)
00004 // Copyright (C) 1998 Pascal Vincent
00005 // Copyright (C) 2005 Yoshua Bengio
00006 
00007 // Redistribution and use in source and binary forms, with or without
00008 // modification, are permitted provided that the following conditions are met:
00009 // 
00010 //  1. Redistributions of source code must retain the above copyright
00011 //     notice, this list of conditions and the following disclaimer.
00012 // 
00013 //  2. Redistributions in binary form must reproduce the above copyright
00014 //     notice, this list of conditions and the following disclaimer in the
00015 //     documentation and/or other materials provided with the distribution.
00016 // 
00017 //  3. The name of the authors may not be used to endorse or promote
00018 //     products derived from this software without specific prior written
00019 //     permission.
00020 // 
00021 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
00022 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00023 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
00024 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00025 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00026 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00027 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00028 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00029 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00030 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00031 // 
00032 // This file is part of the PLearn library. For more information on the PLearn
00033 // library, go to the PLearn Web site at www.plearn.org
00034 
00035 
00036 /* *******************************************************      
00037  * $Id: LocalizedFeaturesLayerVariable.h 3994 2005-08-25 13:35:03Z chapados $
00038  * This file is part of the PLearn library.
00039  ******************************************************* */
00040 
00041 #ifndef LocalizedFeaturesLayerVariable_INC
00042 #define LocalizedFeaturesLayerVariable_INC
00043 
00044 #include "NaryVariable.h"
00045 
00046 namespace PLearn {
00047 using namespace std;
00048 
00049 
00055 class LocalizedFeaturesLayerVariable: public NaryVariable
00056 {
00057     typedef NaryVariable inherited;
00058 
00060 
00062     int n_features; // = nb inputs
00063     int n_subsets; // = feature_subsets.length()
00064     int n_weights; 
00065 
00067     Mat mu;
00068 
00072     TVec<Mat> local_weights;
00073 
00074 public:
00075 
00077     bool backprop_to_inputs;
00078     VMat feature_locations; // n_features x n_dim
00079     TVec<TVec<int> > feature_subsets; // n_subsets x (nb of features in i-th subset)
00080     int n_hidden_per_subset;
00081     bool knn_subsets;
00082     int n_neighbors_per_subset;
00083     bool gridding_subsets;
00084     bool center_on_feature_locations;
00085     long seed;
00086     bool shared_weights;
00087     int n_box;
00088     real sigma;
00089 
00091     LocalizedFeaturesLayerVariable();
00092 
00093     PLEARN_DECLARE_OBJECT(LocalizedFeaturesLayerVariable);
00094 
00095     virtual void build();
00096 
00097     virtual void makeDeepCopyFromShallowCopy(CopiesMap& copies);
00098 
00099     virtual void recomputeSize(int& l, int& w) const;
00100     virtual void fprop();
00101     virtual void bprop();
00102 
00103 protected:
00104 
00105     static void declareOptions(OptionList &ol);
00106 
00107     virtual void computeSubsets();
00108 
00109 private:
00110 
00111     void build_();
00112 
00113 };
00114 
00115 DECLARE_OBJECT_PTR(LocalizedFeaturesLayerVariable);
00116 
00117 } // end of namespace PLearn
00118 
00119 #endif 
00120 
00121 
00122 /*
00123   Local Variables:
00124   mode:c++
00125   c-basic-offset:4
00126   c-file-style:"stroustrup"
00127   c-file-offsets:((innamespace . 0)(inline-open . 0))
00128   indent-tabs-mode:nil
00129   fill-column:79
00130   End:
00131 */
00132 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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