Based on this. This uses GD to produce a more precise graphical output.

$_="JUST ANOTHER PERL HACKER,";use GD;$i=new GD::Image(113,350);$i->fi
+ll
(0,0,$i->colorAllocate(255,255,255));s#.{5}#$d=5;@a=($q=0,map{$d+=$f++
+%2
?3*$_:$_;$_;}map{split//}unpack C5,$&);push@a,10-$d%10;@g=(3,5,23,join
+( 
"",@a)=~/(.{6})/,63,$');$b=$i->colorAllocate(0,0,0);$t=9;map{$h=$q++%7
+? 
50:60;$i->line(++$t,$y+9,$t,$y+$h,$_?$b:$w)for split//,/1/?$_.$i->stri
+ng
(gdTinyFont,shift@g,53+$y,shift@g,$b):do{$l=$z=unpack B7,pack v,unpack
+(x
.$_.C,"5A;eKYWc_3")-40<<1;$z=~s/./1^$&/eg;$m=reverse$z;${qw.l m m l l 
+m.
[$c++%12]||z}}}101,splice(@a,0,6,"01010"),@a,101;$y+=70#eg;print$i->pn
+g
[download]

The output should be piped into a png file thusly:
# perl ean-13.pl > out.png enjoy.
al
ps. for those without GD, the image can be seen on my homenode