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sparse-dictionary-learning's Introduction

Sparse-dictionary-learning

Learn an Sparse dictionary of 8 x 8 patches using an algorithm similar to K-SVD

Screenshot

You can change the following variables in the file 'Form1.cs' to ajust the process.

Example 1

 int N =4;
 int CoefsN =128;
 int KSVD_Depth =2;

Example 2

 int N =2;
 int CoefsN =3;
 int KSVD_Depth =3;

Example 3

 int N =8;
 int CoefsN =64;
 int KSVD_Depth =64;     

Example 4

 int N =8;
 int CoefsN =16;
 int KSVD_Depth =16;      

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sparse-dictionary-learning's Issues

Could a expert look at this?

It does not work in some cases.

  1. For example N = 2 goes into NaN values.

     int N = 2;
     int CoefsN =4;
     int KSVD_Depth =4;
    
  2. Big over complete dictionairies are far from optimal.
    The algorithm is in this case unstable.

    int N = 4;
     int CoefsN =128;
     int KSVD_Depth =4;
    

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