[magick-users] Vertical split

[Guido Milanese]

I am sorry for asking a trivial question, but I normally use 
Imagemagick at a very basic level
I would like to split a collection of images (scanning from a book) 
in 2 equal vertical images:

|----------|
|          |
|          |	file01.jpg
|----------|

|-----|-----|
|     |     |	file01a.jpg file01b.jpg
|     |     |
|-----|-----|

i.e. the even and odd page. I could obtain this with gimp or 
similar, but since I have about 50 files I would like to do via 
command line with a script. I tried with crop but I was lost in page 
geometry!

thanks,
guido
-- 
Guido Milanese - Professor of Latin
The Catholic University, Milan and Brescia, Italy
http://docenti.unicatt.it/milanese_guido
http://www.arsantiqua.org