\begin{table}%T2
\caption{\label{tab_psnr_pol_sync}Error (in dB) for both the $Q$ and $U$ components between the original synchrotron image and  respectively 
its noisy version and the results obtained by the hard thresholding using different dictionaries.}
\small%\centering
\par
\begin{tabular}{l|ccccc}
\hline\hline
$Q$ Component   &                    &  &  & &  \\      
   Noisy image   & $19.99$    &   $13.98$   &   $6.02$     &   $-0.005$   &   $-6.02$   \\      \hline 
  $QU-UWT $	 &  $33.40$   &   $31.27$   &   $27.78$   &   $24.71$    &   $21.16$ \\
  $EB-UWT $	 &   $33.03$   &  $30.53$   &   $26.79$   &  $23.86$     &   $20.76$   \\
  $QU-CUR $	&   $35.04$   &  $32.92$     &    $29.19$   &  $26.19$  &	 $22.37$   \\
  $EB-CUR $	&    $34.83$   &  $32.09$   &    $27.89$   &  $24.81$    &   $ 21.06$    \\   
{\it OWT}                   &   $33.20$    & $30.10$   &    $ 25.72$   &   $22.62$   &    $19.39$     \\    
{\it MP-UWT}     &    $26.76$    & $23.05$  &     $17.85$   &    $13.69$  &   $8.97$  \\  \hline
$U$ Component  &                 &  &  & &                \\     
Noisy image    & $19.99$    &   $13.97$   &   $6.01$     &   $-0.007$      &   $-6.01$   \\      \hline  
  $QU-UWT$ 	&   $32.90$   &   $31.25$   &   $29.04$   &   $27.51$     &   $25.27$ \\
  $EB-UWT$ 	 &   $33.22$   &  $31.43$   &   $29.11$   &  $26.99$       &   $24.35$  \\
  $QU-CUR$ 	&   $33.79$   &  $ 31.75$     &    $29.28$   &  $27.71$    & $25.46$     \\
  $EB-CUR$ 	 &    $34.05$   &  $ 31.98$   &    $29.38$   &  $27.17$    &  $24.07$    \\	
{\it OWT }                  &   $32.69$    &    $30.49$   &   $27.87$   & $25.49$ &    $21.87$   \\ 
{\it $MP-UWT$ }    &    $26.76$    &   $22.76$   & $17.85$  &     $13.86$   &    $ 9.41$   \\  \hline 
\end{tabular}
\par
\end{table}