im_ = (imdb.images.data(:,:,:,test_image(:,1))) ;
     res = vl_simplenn(net, im) ;
     figure(3) ; clf ;
     decodeCharacters(net, imdb, im_, res) ;
     [score(i),pred(i)] = max(squeeze(res(end).x(1,i,:))) ;
     fprintf('Predicted class: %sn', imdb.meta.classes(pred)) ;