Incoherent Dictionary Learning Method Based on Unit Norm Tight Frame and Manifold Optimization for Sparse Representation

Algorithm 1

Improved INKSVD algorithm: UNTF-INKSVD.

       Input: initial dictionary , , , iterations

      Output:

()    Initialize:

()    ;

()    ;

()    ;

()    normalize the columns of ;

()    while    do

()      Obtain the new dictionary by solving (10) based on the ;

()      ;

()      Normalize the columns of , ;

()   Compute the new mutual coherence and ;

()   if    then

()    ;

()   end

()   Update , ;

()   if    then

()    break;

()   end

() end

() return ;