blutdir_params="--levels $nb_levels --metric $metric --optimizer $optimizer --samples $nb_samples --spacing $spacing,$spacing,$spacing --bins $hist_bins --maxIt $nb_iter --interp $interpolator --verbose"
cmd="clitkBLUTDIR -r $reference -t $target -m $mask_ref --targetMask $mask_targ --vf $vf -o $result $blutdir_params"
$cmd > $log
blutdir_params="--levels $nb_levels --metric $metric --optimizer $optimizer --samples $nb_samples --spacing $spacing,$spacing,$spacing --bins $hist_bins --maxIt $nb_iter --interp $interpolator --verbose"
cmd="clitkBLUTDIR -r $reference -t $target -m $mask_ref --targetMask $mask_targ --vf $vf -o $result $blutdir_params"
$cmd > $log