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Purpose of the hyperparameters
 
 
 
  is the weighting factor between the data term and the regularization term

  represents the threshold w.r.t. the discontinuities

 
Choice of  and  ?
 
  
manual
choice
      
automatic
estimation
       
difficult : 
2 degrees of freedom
    it is the subject
of our research
       
      which estimator
should we choose?
 
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André Jalobeanu - 24 Aug 1998