I guess this is why one should come to perlmonk often.
I have never thought of this before, and this is definitely a reply I didn't expect. One's thinking is always narrowed, and that's why one need talk to people, ask for wisedom!
I will look into it more, and see whether can turn this into a picture transformation module. I feel that it is a bit of waste to use it only for text, considering the thinking and implementation might take. If I come up with anything, I will post it in cool use of Perl and credit you on the post.